edutopia.org

edutopia.org is SSL secured

Free website and domain report on edutopia.org

Last Updated: 23rd July, 2022 Update Now
Overview

Snoop Summary for edutopia.org

This is a free and comprehensive report about edutopia.org. The domain edutopia.org is currently hosted on a server located in United States with the IP address 104.26.15.96, where the local currency is USD and English is the local language. Our records indicate that edutopia.org is owned/operated by Statutory Masking Enabled. Edutopia.org is expected to earn an estimated $141 USD per day from advertising revenue. The sale of edutopia.org would possibly be worth $102,755 USD. This figure is based on the daily revenue potential of the website over a 24 month period. Edutopia.org is wildly popular with an estimated 33,282 daily unique visitors. This report was last updated 23rd July, 2022.

About edutopia.org

Site Preview: edutopia.org edutopia.org
Title: Edutopia
Description: We share evidence and practitioner-based learning strategies that empower you to improve K-12 education. 
Keywords and Tags: education, popular, reference
Related Terms: evidence, evidence based, evidence obyvatel, practitioner, spectral evidence
Fav Icon:
Age: Over 22 years old
Domain Created: 5th August, 2002
Domain Updated: 3rd September, 2020
Domain Expires: 5th August, 2025
Review

Snoop Score

4/5 (Excellent!)

Valuation

$102,755 USD
Note: All valuation figures are estimates.

Popularity

High
Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank: 22,704
Alexa Reach:
SEMrush Rank (US):
SEMrush Authority Score:
Moz Domain Authority: 0
Moz Page Authority: 0

Organic vs Paid (Google Ads)

Traffic

Visitors

Daily Visitors: 33,282
Monthly Visitors: 1,012,999
Yearly Visitors: 12,147,930
Note: All visitors figures are estimates.

Visitors By Country

Revenue

Revenue

Daily Revenue: $141 USD
Monthly Revenue: $4,284 USD
Yearly Revenue: $51,372 USD
Note: All revenue figures are estimates.

Revenue By Country

SEO

Backlinks Analysis (SEMrush)

Top New Follow Links

Top Ranking Keywords (US)

Domain Analysis

Value Length
Domain: edutopia.org 12
Domain Name: edutopia 8
Extension (TLD): org 3
Expiry Check:

Page Speed Analysis

Average Load Time: 2.49 seconds
Load Time Comparison: Faster than 30% of sites

PageSpeed Insights

Avg. (All Categories) 81
Performance 79
Accessibility 93
Best Practices 71
SEO 100
Progressive Web App 63
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://www.edutopia.org/
Updated: 11th January, 2021

1.69 seconds
First Contentful Paint (FCP)
52%
40%
8%

0.00 seconds
First Input Delay (FID)
98%
1%
1%

Simulate loading on desktop
79

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for edutopia.org. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Speed Index — 1.0 s
The time taken for the page contents to be visibly populated.
Cumulative Layout Shift — 0.005
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

First CPU Idle — 1.8 s
The time taken for the page's main thread to be quiet enough to handle input.
Estimated Input Latency — 20 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive edutopia.org as laggy when the latency is higher than 0.05 seconds.
Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://edutopia.org/
0
68.514999991748
674
0
301
https://www.edutopia.org/
72.150000021793
234.94799999753
65193
779503
200
text/html
Document
https://use.typekit.net/af/ef2129/00000000000000003b9b387c/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3
253.26399999904
267.77500001481
18371
18068
200
application/font-woff2
Font
https://use.typekit.net/af/403911/00000000000000003b9b3880/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n6&v=3
253.49000003189
267.35899999039
18303
18000
200
application/font-woff2
Font
https://use.typekit.net/af/aa1d64/00000000000000003b9b387a/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n3&v=3
253.69600002887
339.04699998675
17591
17288
200
application/font-woff2
Font
https://use.typekit.net/af/e8450c/00000000000000003b9b387e/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n5&v=3
253.89699998777
336.9970000349
17511
17208
200
application/font-woff2
Font
https://www.edutopia.org/assets/client.09ea45dd7cfd929022f6.js
254.10800002282
422.52800002461
65665
282771
200
application/javascript
Script
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
254.44600003539
434.67899999814
178432
558439
200
application/javascript
Script
https://use.typekit.net/njt0djr.css
254.64400002966
279.27900000941
1360
7394
200
text/css
Stylesheet
https://www.edutopia.org/assets/facebook-share.svg
270.29100002255
343.62800000235
1443
828
200
image/svg+xml
Image
https://www.edutopia.org/assets/twitter-share.svg
270.47400001902
312.65099998564
1541
1555
200
image/svg+xml
Image
https://www.edutopia.org/assets/instagram-share.svg
270.84399998421
313.97600000491
1913
3245
200
image/svg+xml
Image
https://www.edutopia.org/assets/pinterest-share.svg
271.43500000238
314.63500001701
1714
1977
200
image/svg+xml
Image
https://www.edutopia.org/assets/youtube-share.svg
271.68700000038
379.1879999917
1618
2141
200
image/svg+xml
Image
https://p.typekit.net/p.css?s=1&k=njt0djr&ht=tk&f=24349.24350.24351.24352.24354.24355.43309.43310.43311.43312&a=14692343&app=typekit&e=css
281.88600001158
365.87400001008
302
5
200
text/css
Stylesheet
415.45000002952
415.48700002022
0
731
200
image/svg+xml
Image
416.87000001548
416.89500003122
0
628
200
image/svg+xml
Image
418.26400003629
418.29599998891
0
567
200
image/svg+xml
Image
https://www.edutopia.org/assets/image-icon-w45.svg
419.60800002562
436.98200001381
1380
1657
200
image/svg+xml
Image
https://www.edutopia.org/assets/image-icon-w35.svg
420.35600001691
470.23400000762
1378
1652
200
image/svg+xml
Image
https://www.edutopia.org/assets/video-circle-white.svg
420.77700002119
436.08200002927
1590
975
200
image/svg+xml
Image
https://www.edutopia.org/assets/fonts/29D59A_1_0.woff
428.66000003414
448.26800003648
37884
37293
200
font/woff
Font
https://www.edutopia.org/assets/fonts/29D59A_0_0.woff
428.79500001436
475.5839999998
37160
36569
200
font/woff
Font
https://use.typekit.net/af/aee0aa/00000000000000003b9b3f03/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n5&v=3
428.9609999978
444.28900000639
13987
13684
200
application/font-woff2
Font
https://media.edutopia.org/styles/responsive_1400px_16x9/s3/masters/2021-01/a3153ir1207-crop.jpg
479.18800002662
584.57800000906
239440
238150
200
image/jpeg
Image
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/iStock-1202123993-crop.jpg
479.39100000076
579.76900000358
65593
64238
200
image/webp
Image
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/TTNM3M-crop.jpg
479.58899999503
559.62000001455
11580
10232
200
image/webp
Image
https://img.youtube.com/vi/XbHfgB8AtGY/mqdefault.jpg
479.81900000013
486.62600002717
13971
13463
200
image/jpeg
Image
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/mm_hires.jpg
479.95900001843
605.14100000728
36696
35402
200
image/jpeg
Image
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/istockphoto-1285355686-crop.jpg
480.28200003318
581.14200003911
20686
19328
200
image/webp
Image
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/RRXG17-crop.jpg
480.43799999868
561.41600001138
32310
31017
200
image/jpeg
Image
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/B1GCA8-crop.jpg
480.63499998534
586.41600003466
11863
10514
200
image/webp
Image
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/Screen%20Shot%202020-12-21%20at%209.47.03%20AM%20%281%29.png
480.8240000275
578.84800003376
135064
133702
200
image/webp
Image
https://img.youtube.com/vi/tEwFnfuMwy0/maxresdefault.jpg
480.96900002565
490.67900003865
117930
117421
200
image/jpeg
Image
https://img.youtube.com/vi/cht0Lm0rBAY/maxresdefault.jpg
481.34200001368
491.18800001452
84894
84378
200
image/jpeg
Image
https://img.youtube.com/vi/Gv-_SxltpPY/maxresdefault.jpg
481.46600002656
492.97700001625
85495
84987
200
image/jpeg
Image
https://img.youtube.com/vi/LbwfOHbrddw/maxresdefault.jpg
481.98300000513
496.66000000434
122402
121885
200
image/jpeg
Image
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/TTRX63-crop.jpg
483.82000002312
551.06399999931
18738
17386
200
image/webp
Image
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/iStock-1093455222.jpg
483.9970000321
636.36599999154
16205
14846
200
image/webp
Image
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/BCG754-crop.jpg
484.39400002826
560.76399999438
19456
18114
200
image/webp
Image
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/istockphoto-1254919925-crop.jpg
484.58099999698
563.13500000397
20699
19334
200
image/webp
Image
https://www.google-analytics.com/analytics.js
854.64299999876
859.58200000459
19452
47051
200
text/javascript
Script
https://www.edutopia.org/assets/0.bbdade96b8f8a655c248.js
857.03000001376
872.90100002429
6914
20876
200
application/javascript
Script
https://www.edutopia.org/assets/1.3ec5d5fe0509028cd3ac.js
857.48000000603
1012.1750000399
5209
15913
200
application/javascript
Script
https://www.edutopia.org/assets/2.17b9215b7351485d51f7.js
857.91900003096
875.10200001998
12565
52477
200
application/javascript
Script
https://www.edutopia.org/assets/7.d495f6d128a278029cb3.js
858.34700003034
904.1150000412
9870
47978
200
application/javascript
Script
https://connect.facebook.net/en_US/fbevents.js
865.90400000568
881.62699999521
24711
91651
200
application/x-javascript
Script
https://www.google-analytics.com/plugins/ua/linkid.js
937.26000003517
942.00999999885
1460
1569
200
text/javascript
Script
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
962.9459999851
982.41400002735
72129
246214
200
application/x-javascript
Script
https://www.google-analytics.com/j/collect?v=1&_v=j87&a=2016803217&t=pageview&_s=1&dl=https%3A%2F%2Fwww.edutopia.org%2F&ul=en-us&de=UTF-8&dt=Home%20%7C%20Edutopia&sd=24-bit&sr=800x600&vp=1350x940&je=0&_u=aGBAAEIhAAAAAC~&jid=454496579&gjid=487509386&cid=1979261250.1610391826&tid=UA-539491-1&_gid=1156040192.1610391826&_r=1&_slc=1&_av=2.4.1&_au=124&cd3=0&did=i5iSjo&z=185414779
975.91800004011
979.74700003397
625
2
200
text/plain
XHR
https://www.facebook.com/tr/?id=888772407811621&ev=PageView&dl=https%3A%2F%2Fwww.edutopia.org%2F&rl=&if=false&ts=1610391825859&sw=800&sh=600&v=2.9.32&r=stable&ec=0&o=30&fbp=fb.1.1610391825857.236284968&it=1610391825801&coo=false&rqm=GET
1022.815000033
1038.0190000287
507
44
200
image/gif
Image
https://www.edutopia.org/
1156.8410000182
1269.300999993
65193
779503
200
text/html
XHR
https://www.edutopia.org/
1157.5880000019
1205.3380000289
65193
779503
200
text/html
XHR
https://www.facebook.com/tr/?id=888772407811621&ev=Microdata&dl=https%3A%2F%2Fwww.edutopia.org%2F&rl=&if=false&ts=1610391826363&cd[DataLayer]=%5B%5D&cd[Meta]=%7B%22title%22%3A%22Home%20%7C%20Edutopia%22%2C%22meta%3Adescription%22%3A%22We%20share%20evidence%20and%20practitioner-based%20learning%20strategies%20that%20empower%20you%20to%20improve%20K-12%20education.%C2%A0%22%7D&cd[OpenGraph]=%7B%22og%3Asite_name%22%3A%22Edutopia%22%2C%22og%3Aurl%22%3A%22https%3A%2F%2Fwww.edutopia.org%22%2C%22og%3Atype%22%3A%22article%22%2C%22og%3Atitle%22%3A%22Home%22%2C%22og%3Adescription%22%3A%22We%20share%20evidence%20and%20practitioner-based%20learning%20strategies%20that%20empower%20you%20to%20improve%20K-12%20education.%C2%A0%22%7D&cd[Schema.org]=%5B%5D&cd[JSON-LD]=%5B%5D&sw=800&sh=600&v=2.9.32&r=stable&ec=1&o=30&fbp=fb.1.1610391825857.236284968&it=1610391825801&coo=false&es=automatic&tm=3&rqm=GET
1525.0770000275
1538.4000000195
507
44
200
image/gif
Image
https://www.google-analytics.com/collect
1645.7670000382
1646.8539999914
0
0
-1
Other
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
279.789
9.119
292.676
11.921
330.87
7.661
350.196
5.876
437.099
81.996
519.138
23.277
549.713
10.21
564.48
17.182
585.501
331.683
917.235
19.595
966.408
20.982
987.429
12.416
1004.186
8.753
1031.442
27.441
1059.621
135.379
1195.101
7.83
1204.721
5.205
1243.041
9.903
1255.925
23.448
1310.253
25.987
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Eliminate render-blocking resources
Resources, such as JavaScript and style sheets, can block the first paint of the page. Edutopia.org should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Edutopia.org should consider lazy-loading offscreen and hidden images.
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Edutopia.org should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Edutopia.org should consider minifying JS files.
Remove unused CSS — Potential savings of 14 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Edutopia.org should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
.css-fii7o5 { float: left; width: calc(100% - 260px); height: 60px; } ...
14841
14841
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Serve images in next-gen formats — Potential savings of 72 KiB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://img.youtube.com/vi/Gv-_SxltpPY/maxresdefault.jpg
84987
39407
https://img.youtube.com/vi/LbwfOHbrddw/maxresdefault.jpg
121885
18465
https://img.youtube.com/vi/cht0Lm0rBAY/maxresdefault.jpg
84378
15500
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 160 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
URL Time Spent (Ms)
https://www.edutopia.org/
163.783
Avoid multiple page redirects — Potential savings of 3,490 ms
Redirects can cause additional delays before the page can begin loading. Edutopia.org should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
http://edutopia.org/
3490
https://www.edutopia.org/
0
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Edutopia.org should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.
Avoid serving legacy JavaScript to modern browsers — Potential savings of 12 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.
URL Potential Savings (Bytes)
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
11988
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
119
https://www.edutopia.org/assets/1.3ec5d5fe0509028cd3ac.js
82
https://connect.facebook.net/en_US/fbevents.js
45

Diagnostics

Avoids enormous network payloads — Total size was 1,780 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://media.edutopia.org/styles/responsive_1400px_16x9/s3/masters/2021-01/a3153ir1207-crop.jpg
239440
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
178432
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/Screen%20Shot%202020-12-21%20at%209.47.03%20AM%20%281%29.png
135064
https://img.youtube.com/vi/LbwfOHbrddw/maxresdefault.jpg
122402
https://img.youtube.com/vi/tEwFnfuMwy0/maxresdefault.jpg
117930
https://img.youtube.com/vi/Gv-_SxltpPY/maxresdefault.jpg
85495
https://img.youtube.com/vi/cht0Lm0rBAY/maxresdefault.jpg
84894
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
72129
https://www.edutopia.org/assets/client.09ea45dd7cfd929022f6.js
65665
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/iStock-1202123993-crop.jpg
65593
Avoids an excessive DOM size — 584 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
584
Maximum DOM Depth
15
Maximum Child Elements
8
Avoid chaining critical requests — 2 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Edutopia.org should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
JavaScript execution time — 0.5 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://www.edutopia.org/assets/client.09ea45dd7cfd929022f6.js
297.902
293.202
4.171
https://www.edutopia.org/
230.508
18.475
18.908
https://www.edutopia.org/assets/1.3ec5d5fe0509028cd3ac.js
186.329
171.01
0.968
Unattributable
100.032
1.113
0.182
Minimizes main-thread work — 0.9 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Script Evaluation
547.735
Other
155.041
Style & Layout
123.262
Script Parsing & Compilation
44.861
Rendering
27.425
Parse HTML & CSS
23.432
Garbage Collection
6.146
All text remains visible during webfont loads
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
Keep request counts low and transfer sizes small — 52 requests • 1,780 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
52
1822367
Image
27
1066613
Script
10
396407
Font
7
160807
Other
5
131685
Document
1
65193
Stylesheet
2
1662
Media
0
0
Third-party
20
631508
Minimize third-party usage — Third-party code blocked the main thread for 0 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
424692
0
97854
0
87425
0
21537
0
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
Avoid large layout shifts — 4 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
0.0041358334702924
0.00066535787284204
1.7993140919269E-5
30
1.5188454684851E-5
Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 2 long tasks found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URL Start Time (Ms) Duration (Ms)
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
2500
332
https://www.edutopia.org/assets/1.3ec5d5fe0509028cd3ac.js
3200
135
Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.
Avoids large JavaScript libraries with smaller alternatives — 0 large libraries found
It is recommended to work with smaller JavaScript libraries to reduce your bundle size and avoid poor performance.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Metrics

First Contentful Paint — 1.0 s
The time taken for the first image or text on the page to be rendered.
Time to Interactive — 2.6 s
The time taken for the page to become fully interactive.
Total Blocking Time — 180 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).

Other

First Meaningful Paint — 1.0 s
The time taken for the primary content of the page to be rendered.

Opportunities

Properly size images — Potential savings of 588 KiB
Images can slow down the page's load time. Edutopia.org should consider serving more appropriate-sized images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/Screen%20Shot%202020-12-21%20at%209.47.03%20AM%20%281%29.png
133702
100277
https://img.youtube.com/vi/LbwfOHbrddw/maxresdefault.jpg
121885
92556
https://img.youtube.com/vi/tEwFnfuMwy0/maxresdefault.jpg
117421
89167
https://img.youtube.com/vi/Gv-_SxltpPY/maxresdefault.jpg
84987
64537
https://img.youtube.com/vi/cht0Lm0rBAY/maxresdefault.jpg
84378
64075
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/iStock-1202123993-crop.jpg
64238
35357
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/mm_hires.jpg
35402
26552
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/RRXG17-crop.jpg
31017
23263
https://media.edutopia.org/styles/responsive_1400px_16x9/s3/masters/2021-01/a3153ir1207-crop.jpg
238150
16665
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/istockphoto-1254919925-crop.jpg
19334
14501
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/istockphoto-1285355686-crop.jpg
19328
14496
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/BCG754-crop.jpg
18114
13586
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/TTRX63-crop.jpg
17386
13040
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/iStock-1093455222.jpg
14846
11135
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/B1GCA8-crop.jpg
10514
7886
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/TTNM3M-crop.jpg
10232
7674
https://img.youtube.com/vi/XbHfgB8AtGY/mqdefault.jpg
13463
7138
Remove unused JavaScript — Potential savings of 162 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
178432
87757
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
72129
53708
https://www.edutopia.org/assets/client.09ea45dd7cfd929022f6.js
65665
24117

Metrics

Largest Contentful Paint — 2.6 s
The timing of the largest text or image that is painted.

Other

Max Potential First Input Delay — 330 ms
Users could experience a delay when interacting with the page.

Diagnostics

Serve static assets with an efficient cache policy — 22 resources found
Edutopia.org can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
1200000
72129
https://connect.facebook.net/en_US/fbevents.js
1200000
24711
https://www.google-analytics.com/plugins/ua/linkid.js
3600000
1460
https://img.youtube.com/vi/LbwfOHbrddw/maxresdefault.jpg
7200000
122402
https://img.youtube.com/vi/tEwFnfuMwy0/maxresdefault.jpg
7200000
117930
https://img.youtube.com/vi/Gv-_SxltpPY/maxresdefault.jpg
7200000
85495
https://img.youtube.com/vi/cht0Lm0rBAY/maxresdefault.jpg
7200000
84894
https://www.google-analytics.com/analytics.js
7200000
19452
https://img.youtube.com/vi/XbHfgB8AtGY/mqdefault.jpg
7200000
13971
https://media.edutopia.org/styles/responsive_1400px_16x9/s3/masters/2021-01/a3153ir1207-crop.jpg
259200000
239440
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/Screen%20Shot%202020-12-21%20at%209.47.03%20AM%20%281%29.png
259200000
135064
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/iStock-1202123993-crop.jpg
259200000
65593
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/mm_hires.jpg
259200000
36696
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/RRXG17-crop.jpg
259200000
32310
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/istockphoto-1254919925-crop.jpg
259200000
20699
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/istockphoto-1285355686-crop.jpg
259200000
20686
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/BCG754-crop.jpg
259200000
19456
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/TTRX63-crop.jpg
259200000
18738
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2020-12/iStock-1093455222.jpg
259200000
16205
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/B1GCA8-crop.jpg
259200000
11863
https://media.edutopia.org/styles/responsive_440px_thumbs/s3/masters/2021-01/TTNM3M-crop.jpg
259200000
11580
https://p.typekit.net/p.css?s=1&k=njt0djr&ht=tk&f=24349.24350.24351.24352.24354.24355.43309.43310.43311.43312&a=14692343&app=typekit&e=css
604800000
302
93

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of edutopia.org. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Edutopia.org may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Edutopia.org may provide relevant information that dialogue cannot, by using audio descriptions.

Contrast

Navigation

Heading elements are not in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
Failing Elements

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
71

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that edutopia.org should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Links to cross-origin destinations are safe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids front-end JavaScript libraries with known security vulnerabilities
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
React
core-js
2.6.5: global, 3.0.0: pure
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://edutopia.org/

Audits

Displays images with incorrect aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
URL Aspect Ratio (Displayed) Aspect Ratio (Actual)
https://img.youtube.com/vi/tEwFnfuMwy0/maxresdefault.jpg
630 x 352 (1.79)
1280 x 720 (1.78)
https://img.youtube.com/vi/cht0Lm0rBAY/maxresdefault.jpg
630 x 352 (1.79)
1280 x 720 (1.78)
https://img.youtube.com/vi/Gv-_SxltpPY/maxresdefault.jpg
630 x 352 (1.79)
1280 x 720 (1.78)
https://img.youtube.com/vi/LbwfOHbrddw/maxresdefault.jpg
630 x 352 (1.79)
1280 x 720 (1.78)

Audits

Registers an `unload` listener
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.
URL
Browser errors were logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
URL Description
https://www.google-analytics.com/collect
Failed to load resource: net::ERR_BLOCKED_BY_CLIENT.Inspector
Missing source maps for large first-party JavaScript
Consider deploying source maps for added benefits such as the ability to debug while in production.
URL Map URL
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
100

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for edutopia.org. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of edutopia.org on mobile screens.
Document uses legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Tap targets are sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Links are crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
63

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of edutopia.org. This includes details about web app manifests.

Fast and reliable

Current page responds with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` responds with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Registers a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest meets the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Sets a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of edutopia.org on mobile screens.
Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.
Provides a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.

Fast and reliable

Page load is not fast enough on mobile networks — Interactive on simulated mobile network at 11.7 s
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.

Installable

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://edutopia.org/

PWA Optimized

Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Avg. (All Categories) 70
Performance 16
Accessibility 93
Best Practices 79
SEO 98
Progressive Web App 64
0–49 (Fail) 50–89 (Average) 90–100 (Pass)
URL: https://www.edutopia.org/
Updated: 11th January, 2021

2.78 seconds
First Contentful Paint (FCP)
26%
52%
22%

0.03 seconds
First Input Delay (FID)
95%
3%
2%

Simulate loading on mobile
16

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for edutopia.org. This includes details about optimizing page load times which can result in a better user experience.

Opportunities

Eliminate render-blocking resources
Resources, such as JavaScript and style sheets, can block the first paint of the page. Edutopia.org should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.
Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Edutopia.org should consider lazy-loading offscreen and hidden images.
Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Edutopia.org should consider minifying CSS files.
Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Edutopia.org should consider minifying JS files.
Remove unused CSS — Potential savings of 14 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Edutopia.org should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.
URL Transfer Size (Bytes) Potential Savings (Bytes)
.css-fii7o5 { float: left; width: calc(100% - 260px); height: 60px; } ...
14841
14841
Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.
Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.
Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.
Initial server response time was short — Root document took 50 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.
URL Time Spent (Ms)
https://www.edutopia.org/
46.581
Avoid multiple page redirects — Potential savings of 14,380 ms
Redirects can cause additional delays before the page can begin loading. Edutopia.org should avoid multiple or unnecessary page redirects.
URL Time Spent (Ms)
http://edutopia.org/
14377
https://www.edutopia.org/
0
Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Edutopia.org should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.
Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.
Remove duplicate modules in JavaScript bundles
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.
Avoid serving legacy JavaScript to modern browsers — Potential savings of 12 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.
URL Potential Savings (Bytes)
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
11988
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
119
https://www.edutopia.org/assets/1.3ec5d5fe0509028cd3ac.js
82
https://connect.facebook.net/en_US/fbevents.js
45

Diagnostics

Avoids enormous network payloads — Total size was 1,931 KiB
Large network payloads can cost users money and are linked to long load times.
URL Transfer Size (Bytes)
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/Screen%20Shot%202020-12-21%20at%209.47.03%20AM%20%281%29.png
583822
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
178432
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/mm_hires.jpg
126352
https://img.youtube.com/vi/XbHfgB8AtGY/maxresdefault.jpg
110703
https://media.edutopia.org/styles/responsive_900px_16x9/s3/masters/2021-01/a3153ir1207-crop.jpg
107273
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/RRXG17-crop.jpg
92089
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
72129
https://www.edutopia.org/assets/client.09ea45dd7cfd929022f6.js
65665
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/iStock-1202123993-crop.jpg
65591
https://www.edutopia.org/
65200
Avoids an excessive DOM size — 584 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.
Statistic Element Value
Total DOM Elements
584
Maximum DOM Depth
15
Maximum Child Elements
8
Avoid chaining critical requests — 2 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Edutopia.org should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
User Timing marks and measures
Make use of the User Timing API to measure an app's real-world performance during key user experiences.
All text remains visible during webfont loads
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.
Keep request counts low and transfer sizes small — 44 requests • 1,931 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.
Resource Type Requests Transfer Size (Bytes)
Total
44
1977020
Image
19
1221258
Script
10
396406
Font
7
160807
Other
5
131694
Document
1
65193
Stylesheet
2
1662
Media
0
0
Third-party
16
317518
Minimize third-party usage — Third-party code blocked the main thread for 60 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.
Third-Party Transfer Size (Bytes) Main-Thread Blocking Time (Ms)
97854
48.184
21536
15.848
110703
0
87425
0
Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.
Element
Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.
Element CLS Contribution
0.17333300373305
0.0387807304072
0.032673233734376
0.0089926331379016
0.0018547305846922
Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.
Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.
Avoid long main-thread tasks — 13 long tasks found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.
URL Start Time (Ms) Duration (Ms)
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
10680
1662
https://www.edutopia.org/assets/2.17b9215b7351485d51f7.js
12810
787
https://www.edutopia.org/
1893
156
https://www.edutopia.org/
1743
150
https://www.edutopia.org/assets/2.17b9215b7351485d51f7.js
14480
149
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
8700
126
https://www.edutopia.org/assets/2.17b9215b7351485d51f7.js
14377
103
https://www.google-analytics.com/analytics.js
12342
81
https://connect.facebook.net/en_US/fbevents.js
6270
58
https://www.google-analytics.com/plugins/ua/linkid.js
12423
56
https://www.edutopia.org/
2103
55
https://www.edutopia.org/
2049
54
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
8826
51
Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.
Avoids large JavaScript libraries with smaller alternatives — 0 large libraries found
It is recommended to work with smaller JavaScript libraries to reduce your bundle size and avoid poor performance.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.
Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Other

Network Requests
Below is a list of network requests that were made during page load.
URL Start Time (Ms) End Time (Ms) Transfer Size (Bytes) Resource Size (Bytes) Status Code MIME Type Resource Type
http://edutopia.org/
0
30.88499995647
669
0
301
https://www.edutopia.org/
31.413999968208
76.997999974992
65193
779503
200
text/html
Document
https://use.typekit.net/af/ef2129/00000000000000003b9b387c/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3
95.682999992277
185.28599996353
18371
18068
200
application/font-woff2
Font
https://use.typekit.net/af/403911/00000000000000003b9b3880/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n6&v=3
96.335000009276
111.01999995299
18303
18000
200
application/font-woff2
Font
https://use.typekit.net/af/aa1d64/00000000000000003b9b387a/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n3&v=3
96.750999975484
115.2829999919
17591
17288
200
application/font-woff2
Font
https://use.typekit.net/af/e8450c/00000000000000003b9b387e/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n5&v=3
96.932999964338
111.54399998486
17511
17208
200
application/font-woff2
Font
https://www.edutopia.org/assets/client.09ea45dd7cfd929022f6.js
97.542000003159
123.90000000596
65665
282771
200
application/javascript
Script
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
97.771000000648
141.42399997218
178432
558439
200
application/javascript
Script
https://use.typekit.net/njt0djr.css
97.932000004221
126.12799997441
1360
7394
200
text/css
Stylesheet
https://www.edutopia.org/assets/facebook-share.svg
109.34799996903
142.90199999232
1443
828
200
image/svg+xml
Image
https://www.edutopia.org/assets/twitter-share.svg
109.53899996821
127.97699996736
1541
1555
200
image/svg+xml
Image
https://www.edutopia.org/assets/instagram-share.svg
109.6639999887
126.77099998109
1913
3245
200
image/svg+xml
Image
https://www.edutopia.org/assets/pinterest-share.svg
110.09499995271
125.41400000919
1714
1977
200
image/svg+xml
Image
https://www.edutopia.org/assets/youtube-share.svg
110.7839999604
130.52800000878
1618
2141
200
image/svg+xml
Image
https://p.typekit.net/p.css?s=1&k=njt0djr&ht=tk&f=24349.24350.24351.24352.24354.24355.43309.43310.43311.43312&a=14692343&app=typekit&e=css
133.57499998529
154.3819999788
302
5
200
text/css
Stylesheet
201.7689999775
201.80899999104
0
731
200
image/svg+xml
Image
203.68599996436
203.73000000836
0
659
200
image/svg+xml
Image
204.80399997905
204.8369999975
0
628
200
image/svg+xml
Image
https://www.edutopia.org/assets/image-icon-w45.svg
206.17299998412
228.8309999858
1380
1657
200
image/svg+xml
Image
https://www.edutopia.org/assets/image-icon-w35.svg
207.276000001
223.00599998562
1378
1652
200
image/svg+xml
Image
https://www.edutopia.org/assets/video-circle-white.svg
207.69399998244
222.17699995963
1590
975
200
image/svg+xml
Image
https://www.edutopia.org/assets/fonts/29D59A_1_0.woff
216.95099998033
235.27399997693
37884
37293
200
font/woff
Font
https://www.edutopia.org/assets/fonts/29D59A_0_0.woff
217.09299995564
244.7299999767
37160
36569
200
font/woff
Font
https://use.typekit.net/af/aee0aa/00000000000000003b9b3f03/27/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n5&v=3
217.56899997126
234.55599998124
13987
13684
200
application/font-woff2
Font
https://media.edutopia.org/styles/responsive_900px_16x9/s3/masters/2021-01/a3153ir1207-crop.jpg
271.51299995603
315.65499998396
107273
105979
200
image/jpeg
Image
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/iStock-1202123993-crop.jpg
271.79099997738
308.52399999276
65591
64238
200
image/webp
Image
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/TTNM3M-crop.jpg
272.00900000753
350.13899998739
33649
32302
200
image/webp
Image
https://img.youtube.com/vi/XbHfgB8AtGY/maxresdefault.jpg
272.19699998386
285.84799997043
110703
110194
200
image/jpeg
Image
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/mm_hires.jpg
272.44599995902
324.50899999822
126352
124998
200
image/webp
Image
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2020-12/istockphoto-1285355686-crop.jpg
272.68100000219
336.59500000067
57962
56604
200
image/webp
Image
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/RRXG17-crop.jpg
273.06899998803
364.63999998523
92089
90740
200
image/webp
Image
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/B1GCA8-crop.jpg
274.06699996209
319.28100000368
30226
28878
200
image/webp
Image
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/Screen%20Shot%202020-12-21%20at%209.47.03%20AM%20%281%29.png
276.46999998251
338.03599997191
583822
582462
200
image/webp
Image
https://www.google-analytics.com/analytics.js
666.01699998137
671.3929999969
19452
47051
200
text/javascript
Script
https://www.edutopia.org/assets/0.bbdade96b8f8a655c248.js
669.55099999905
687.82099999953
6914
20876
200
application/javascript
Script
https://www.edutopia.org/assets/1.3ec5d5fe0509028cd3ac.js
670.49099999713
686.8699999759
5209
15913
200
application/javascript
Script
https://www.edutopia.org/assets/2.17b9215b7351485d51f7.js
671.00699996809
690.4799999902
12565
52477
200
application/javascript
Script
https://www.edutopia.org/assets/7.d495f6d128a278029cb3.js
672.26299998583
688.38299997151
9870
47978
200
application/javascript
Script
https://connect.facebook.net/en_US/fbevents.js
672.52099997131
688.97399998968
24711
91651
200
application/x-javascript
Script
https://www.google-analytics.com/plugins/ua/linkid.js
793.26700000092
796.79999995278
1459
1569
200
text/javascript
Script
https://www.edutopia.org/
1002.2659999668
1109.0229999973
65200
779503
200
text/html
XHR
https://www.edutopia.org/
1006.8689999753
1064.6229999838
65200
779503
200
text/html
XHR
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
1029.4219999923
1054.8749999725
72129
246214
200
application/x-javascript
Script
https://www.google-analytics.com/j/collect?v=1&_v=j87&a=2122479365&t=pageview&_s=1&dl=https%3A%2F%2Fwww.edutopia.org%2F&ul=en-us&de=UTF-8&dt=Home%20%7C%20Edutopia&sd=24-bit&sr=360x640&vp=360x640&je=0&_u=aGBAAEIhAAAAAC~&jid=1961569394&gjid=1738021440&cid=1416653611.1610391842&tid=UA-539491-1&_gid=703087676.1610391842&_r=1&_slc=1&_av=2.4.1&_au=124&cd3=0&did=i5iSjo&z=398499972
1059.3289999524
1066.6579999961
625
2
200
text/plain
XHR
https://www.facebook.com/tr/?id=888772407811621&ev=PageView&dl=https%3A%2F%2Fwww.edutopia.org%2F&rl=&if=false&ts=1610391842132&sw=360&sh=640&v=2.9.32&r=stable&ec=0&o=30&fbp=fb.1.1610391842127.138409525&it=1610391842030&coo=false&rqm=GET
1130.4939999827
1146.3189999922
507
44
200
image/gif
Image
https://www.google-analytics.com/collect
1495.0229999959
1500.2189999796
0
0
-1
Other
https://www.facebook.com/tr/?id=888772407811621&ev=Microdata&dl=https%3A%2F%2Fwww.edutopia.org%2F&rl=&if=false&ts=1610391842644&cd[DataLayer]=%5B%5D&cd[Meta]=%7B%22title%22%3A%22Home%20%7C%20Edutopia%22%2C%22meta%3Adescription%22%3A%22We%20share%20evidence%20and%20practitioner-based%20learning%20strategies%20that%20empower%20you%20to%20improve%20K-12%20education.%C2%A0%22%7D&cd[OpenGraph]=%7B%22og%3Asite_name%22%3A%22Edutopia%22%2C%22og%3Aurl%22%3A%22https%3A%2F%2Fwww.edutopia.org%22%2C%22og%3Atype%22%3A%22article%22%2C%22og%3Atitle%22%3A%22Home%22%2C%22og%3Adescription%22%3A%22We%20share%20evidence%20and%20practitioner-based%20learning%20strategies%20that%20empower%20you%20to%20improve%20K-12%20education.%C2%A0%22%7D&cd[Schema.org]=%5B%5D&cd[JSON-LD]=%5B%5D&sw=360&sh=640&v=2.9.32&r=stable&ec=1&o=30&fbp=fb.1.1610391842127.138409525&it=1610391842030&coo=false&es=automatic&tm=3&rqm=GET
1641.513999959
1655.7409999659
507
44
200
image/gif
Image
Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.
Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.
Tasks
Below is a list of the top-level main thread tasks that executed during page load.
Start Time (Ms) End Time (Ms)
120.669
9.721
135.4
8.243
148.766
6.301
195.566
37.393
232.985
78.101
311.343
415.593
727.334
18.303
770.536
27.196
808.151
13.87
824.178
20.212
844.44
196.634
1041.233
8.737
1050.014
14.457
1065.83
10.806
1082.935
14.104
1109.238
25.824
1135.804
31.578
1172.225
37.298
1210.668
8.676
1330.449
6.041
1527.836
5.744
1665.761
12.747
Diagnostics
Below is a collection of useful page vitals.
View Data
Metrics
Below is a collection of metrics.
View Data

Opportunities

Serve images in next-gen formats — Potential savings of 30 KiB
Image formats like PNG and JPEG have poor compression when compared to other next-gen formats, such as JPEG 200, JPEG XR and WebP.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://img.youtube.com/vi/XbHfgB8AtGY/maxresdefault.jpg
110194
31028

Diagnostics

Reduce JavaScript execution time — 3.1 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
URL Total CPU Time (Ms) Script Evaluation (Ms) Script Parse (Ms)
https://www.edutopia.org/assets/client.09ea45dd7cfd929022f6.js
1544.304
1520.468
18.032
https://www.edutopia.org/
1050.74
57.024
90.284
https://www.edutopia.org/assets/2.17b9215b7351485d51f7.js
1045.668
989.552
3.872
Unattributable
422.132
9.088
1.708
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
177.3
151.548
18.596
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
103.192
19.212
38.712
https://www.google-analytics.com/analytics.js
84.4
65.692
6.568
https://connect.facebook.net/en_US/fbevents.js
57.828
46.312
8.228
https://www.google-analytics.com/plugins/ua/linkid.js
57.556
55.02
1.164

Metrics

First Contentful Paint — 6.1 s
The time taken for the first image or text on the page to be rendered.
Speed Index — 6.1 s
The time taken for the page contents to be visibly populated.
Largest Contentful Paint — 9.9 s
The timing of the largest text or image that is painted.
Time to Interactive — 12.0 s
The time taken for the page to become fully interactive.
Total Blocking Time — 1,350 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).
Cumulative Layout Shift — 0.256
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

First CPU Idle — 9.4 s
The time taken for the page's main thread to be quiet enough to handle input.
Max Potential First Input Delay — 1,660 ms
Users could experience a delay when interacting with the page.
First Meaningful Paint — 6.1 s
The time taken for the primary content of the page to be rendered.
Estimated Input Latency — 940 ms
The time taken for the page to respond to user input (during the busiest 5 second window of page load). Users are likely to perceive edutopia.org as laggy when the latency is higher than 0.05 seconds.
First Contentful Paint (3G) — 10797 ms
The time taken for the first image or text on the page to be rendered while on a 3G network.

Opportunities

Properly size images — Potential savings of 255 KiB
Images can slow down the page's load time. Edutopia.org should consider serving more appropriate-sized images.
URL Resource Size (Bytes) Potential Savings (Bytes)
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/Screen%20Shot%202020-12-21%20at%209.47.03%20AM%20%281%29.png
582462
117790
https://img.youtube.com/vi/XbHfgB8AtGY/maxresdefault.jpg
110194
63001
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/mm_hires.jpg
124998
25278
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/RRXG17-crop.jpg
90740
18350
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/iStock-1202123993-crop.jpg
64238
12991
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2020-12/istockphoto-1285355686-crop.jpg
56604
11447
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/TTNM3M-crop.jpg
32302
6532
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/B1GCA8-crop.jpg
28878
5840
Remove unused JavaScript — Potential savings of 159 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.
URL Transfer Size (Bytes) Potential Savings (Bytes)
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
178432
84495
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
72129
53708
https://www.edutopia.org/assets/client.09ea45dd7cfd929022f6.js
65665
24107

Diagnostics

Serve static assets with an efficient cache policy — 14 resources found
Edutopia.org can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.
URL Cache TTL (Ms) Transfer Size (Bytes)
https://connect.facebook.net/signals/config/888772407811621?v=2.9.32&r=stable
1200000
72129
https://connect.facebook.net/en_US/fbevents.js
1200000
24711
https://www.google-analytics.com/plugins/ua/linkid.js
3600000
1459
https://img.youtube.com/vi/XbHfgB8AtGY/maxresdefault.jpg
7200000
110703
https://www.google-analytics.com/analytics.js
7200000
19452
https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/Screen%20Shot%202020-12-21%20at%209.47.03%20AM%20%281%29.png
259200000
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https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/mm_hires.jpg
259200000
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https://media.edutopia.org/styles/responsive_900px_16x9/s3/masters/2021-01/a3153ir1207-crop.jpg
259200000
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https://media.edutopia.org/styles/responsive_940px_thumbs/s3/masters/2021-01/RRXG17-crop.jpg
259200000
92089
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259200000
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259200000
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https://p.typekit.net/p.css?s=1&k=njt0djr&ht=tk&f=24349.24350.24351.24352.24354.24355.43309.43310.43311.43312&a=14692343&app=typekit&e=css
604800000
302
Minimize main-thread work — 4.6 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.
Category Time Spent (Ms)
Script Evaluation
2918.516
Other
577.564
Style & Layout
517.704
Script Parsing & Compilation
205.064
Rendering
185.576
Parse HTML & CSS
139.948
Garbage Collection
43.016
93

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of edutopia.org. This includes details about various page attributes that can be optimized.

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.
The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.
`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.
No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.
`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.
`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.
ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.
`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.
`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.
`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.
ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.
`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.
`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.
ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.
Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.
`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.
Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.
Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.
`<object>` elements have `[alt]` text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.
Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
It is advised to not include data elements in tables which are used for layout purposes, as it may create confusion for screen reader and other assistive technology users.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.
`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.
`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.
`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Edutopia.org may provide assistance to deaf or hearing-impaired users with captions on videos.
`<video>` elements contain a `<track>` element with `[kind="description"]`
Edutopia.org may provide relevant information that dialogue cannot, by using audio descriptions.

Contrast

Navigation

Heading elements are not in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.
Failing Elements

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.
Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.
Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.
The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.
User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.
Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.
Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.
Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.
Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.
HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.
79

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that edutopia.org should incorporate. This includes practices such as protecting pages with HTTPS.

Audits

Links to cross-origin destinations are safe
Improve performance and prevent security vulnerabilities by adding rel="noopener" and rel="noreferrer" to external links.
Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.
Avoids front-end JavaScript libraries with known security vulnerabilities
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.
Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.
Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.
Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.
Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Avoids Application Cache
Application cache is deprecated and is no longer recommended.
Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.
Name Version
React
core-js
2.6.5: global, 3.0.0: pure
Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://edutopia.org/

Audits

Registers an `unload` listener
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.
URL
Browser errors were logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.
URL Description
https://www.google-analytics.com/collect
Failed to load resource: net::ERR_BLOCKED_BY_CLIENT.Inspector
Missing source maps for large first-party JavaScript
Consider deploying source maps for added benefits such as the ability to debug while in production.
URL Map URL
https://www.edutopia.org/assets/vendor.e99ebb8064a68b396f22.js
98

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for edutopia.org. This includes optimizations such as providing meta data.

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of edutopia.org on mobile screens.
Document uses legible font sizes — 99.86% legible text
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.
Source Selector % of Page Text Font Size
.css-1htucsv
0.14%
11px
99.86%
≥ 12px

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.
Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.
Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.
Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.
Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.
Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.
Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.
Links are crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.
Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.
robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

Mobile Friendly

Tap targets are not sized appropriately — 80% appropriately sized tap targets
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.
Tap Target Size Overlapping Target
40x27
40x27
43x27
169x27
194x27
201x27
62x27
111x27
212x27
148x27
169x27
83x27
91x27
176x27
149x27
96x27
124x27
94x27
87x27
110x27

Manual Checks

Structured data is valid
Structured data can be validated through the use of the Structured Data Testing Tool and the Structured Data Linter.
64

Progressive Web App

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of edutopia.org. This includes details about web app manifests.

Fast and reliable

Current page responds with a 200 when offline
In order for Progressive Web Apps to be made available offline, ensure that the app is using a service worker.
`start_url` responds with a 200 when offline
Consider using a service worker for Progressive Web Apps to ensure greater reliability for the user, in the case of poor network conditions.

Installable

Registers a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.
Web app manifest meets the installability requirements
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.
View Data

PWA Optimized

Redirects HTTP traffic to HTTPS
It is advised to redirect all HTTP traffic to HTTPS, in order to enable secure web features for all users.
Configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data
Sets a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data
Content is sized correctly for the viewport
Ensure that the width of the app's content matches the width of the viewport, otherwise the app might not be optimized for mobile screens.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of edutopia.org on mobile screens.
Contains some content when JavaScript is not available
Apps should display alternative content for when JavaScript is disabled.
Provides a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.

Fast and reliable

Page load is not fast enough on mobile networks — Interactive at 12.0 s
Ensure that the page loads fast enough over a cellular network, to ensure good mobile user experience.

Installable

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.
Insecure URL
http://edutopia.org/

PWA Optimized

Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.
Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.
Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.
Hosting

Server Location

Server IP Address: 104.26.15.96
Continent: North America
Country: United States
United States Flag
Region:
City:
Longitude: -97.822
Latitude: 37.751
Currencies: USD
USN
USS
Languages: English

Web Hosting Provider

Name IP Address
Cloudflare, Inc.
Registration

Domain Registrant

Private Registration: No
Name: Statutory Masking Enabled
Organization: Statutory Masking Enabled
Country: GI
City: Statutory Masking Enabled
State: BUCHARESTI
Post Code: Statutory Masking Enabled
Email: abuse@web.com
Phone: Statutory Masking Enabled
Note: Registration information is derived from various sources and may be inaccurate.

Domain Registrar

Name IP Address
Domainsofvalue.com LLC 162.159.134.53
Security

Visitor Safety

Mature Content: Not Likely
McAfee WebAdvisor Rating: Safe
WOT Rating: 4.6/5 (2 reviews)
WOT Trustworthiness: 92/100
WOT Child Safety: 93/100
Note: Safety information is not guaranteed.

SSL/TLS Certificate

Issued To: *.edutopia.org
Issued By: Amazon
Valid From: 6th May, 2020
Valid To: 6th June, 2021
Subject: CN = *.edutopia.org
Hash: d549f476
Issuer: CN = Amazon
OU = Server CA 1B
O = Amazon
S = US
Version: 2
Serial Number: 13198444903010300177675840621412341805
Serial Number (Hex): 09EDED931963722FABCF7F8025B3D82D
Valid From: 6th May, 2025
Valid To: 6th June, 2025
Signature Algorithm (Short Name): RSA-SHA256
Signature Algorithm (Long Name): sha256WithRSAEncryption
Authority Key Identifier: keyid:59:A4:66:06:52:A0:7B:95:92:3C:A3:94:07:27:96:74:5B:F9:3D:D0
Extended Key Usage: TLS Web Server Authentication, TLS Web Client Authentication
CRL Distribution Points:
Full Name:
URI:http://crl.sca1b.amazontrust.com/sca1b.crl

Certificate Policies: Policy: 2.16.840.1.114412.1.2
Policy: 2.23.140.1.2.1

Authority Information Access: OCSP - URI:http://ocsp.sca1b.amazontrust.com
CA Issuers - URI:http://crt.sca1b.amazontrust.com/sca1b.crt

SCT List: Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : F6:5C:94:2F:D1:77:30:22:14:54:18:08:30:94:56:8E:
E3:4D:13:19:33:BF:DF:0C:2F:20:0B:CC:4E:F1:64:E3
Timestamp : May 6 02:05:16.058 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:45:02:21:00:E4:D9:47:45:45:38:CA:E8:E3:8F:99:
29:8B:C9:33:28:57:65:4E:45:26:BA:20:9B:63:E6:48:
94:9C:E9:B1:67:02:20:71:D2:30:71:D5:29:52:EC:5A:
B2:5F:F7:B1:D5:C9:D1:DC:5B:81:C4:DE:B4:17:66:83:
F5:09:CF:4A:0F:57:43
Signed Certificate Timestamp:
Version : v1 (0x0)
Log ID : 5C:DC:43:92:FE:E6:AB:45:44:B1:5E:9A:D4:56:E6:10:
37:FB:D5:FA:47:DC:A1:73:94:B2:5E:E6:F6:C7:0E:CA
Timestamp : May 6 02:05:16.093 2020 GMT
Extensions: none
Signature : ecdsa-with-SHA256
30:44:02:20:6D:59:6C:DA:01:45:9B:7D:77:2B:C8:A7:
29:AD:AC:D6:04:C2:66:30:A8:35:60:B3:58:B3:D2:A0:
DE:FF:06:54:02:20:0E:12:47:FB:4F:85:75:00:42:C7:
70:36:DC:23:6F:78:05:96:19:02:68:5D:8A:BE:AE:FB:
0F:FF:72:95:E7:5C
Key Usage: Digital Signature, Key Encipherment
Basic Constraints: CA:FALSE
Subject Alternative Name: DNS:*.edutopia.org
Technical

DNS Lookup

HTTP Response Headers

HTTP-Code: HTTP/1.1 200 OK
Content-Type: text/html; charset=utf-8
Date: 11th January, 2021
Server: nginx/1.18.0
Content-Length: 779503
Connection: keep-alive
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
Vary: Accept-Encoding,Accept-Encoding
X-Cache: Hit from cloudfront
Via: 1.1 18bf85a0313cb4e24b1d0538b9294d9d.cloudfront.net (CloudFront)
X-Amz-Cf-Pop: EWR53-C2
X-Amz-Cf-Id: sIT0xIdso9YhrnmQmCHpuSstVOYzsuw_jLwjkQ3Fp-tyI2Vyb_aJoA==
Age: 1131

Whois Lookup

Created: 5th August, 2002
Changed: 3rd September, 2020
Expires: 5th August, 2025
Registrar: Network Solutions, LLC
Status: clientTransferProhibited
Nameservers: major.ns.cloudflare.com
mary.ns.cloudflare.com
Owner Organization: The George Lucas Educational Foundation
Owner State: CA
Owner Country: US
Full Whois: Domain Name: EDUTOPIA.ORG
Registry Domain ID: D86385249-LROR
Registrar WHOIS Server: whois.networksolutions.com
Registrar URL: http://www.networksolutions.com
Updated Date: 2020-03-09T07:12:25Z
Creation Date: 2002-05-08T18:36:37Z
Registry Expiry Date: 2025-05-08T18:36:37Z
Registrar Registration Expiration Date:
Registrar: Network Solutions, LLC
Registrar IANA ID: 2
Registrar Abuse Contact Email: abuse@web.com
Registrar Abuse Contact Phone: +1.8003337680
Reseller:
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registrant Organization: The George Lucas Educational Foundation
Registrant State/Province: CA
Registrant Country: US
Name Server: MARY.NS.CLOUDFLARE.COM
Name Server: MAJOR.NS.CLOUDFLARE.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form https://www.icann.org/wicf/)
>>> Last update of WHOIS database: 2021-01-11T19:02:42Z <<<

For more information on Whois status codes, please visit https://icann.org/epp

Access to Public Interest Registry WHOIS information is provided to assist persons in determining the contents of a domain name registration record in the Public Interest Registry registry database. The data in this record is provided by Public Interest Registry for informational purposes only, and Public Interest Registry does not guarantee its accuracy. This service is intended only for query-based access. You agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data to (a) allow, enable, or otherwise support the transmission by e-mail, telephone, or facsimile of mass unsolicited, commercial advertising or solicitations to entities other than the data recipient's own existing customers; or (b) enable high volume, automated, electronic processes that send queries or data to the systems of Registry Operator, a Registrar, or Afilias except as reasonably necessary to register domain names or modify existing registrations. All rights reserved. Public Interest Registry reserves the right to modify these terms at any time. By submitting this query, you agree to abide by this policy.

The Registrar of Record identified in this output may have an RDDS service that can be queried for additional information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.

Nameservers

Name IP Address
major.ns.cloudflare.com 173.245.59.241
mary.ns.cloudflare.com 108.162.192.134
Related

Subdomains

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Domain Valuation Snoop Score
0/5
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Backlink Competitors

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Domain Valuation Snoop Score
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Sites hosted on the same IP address

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