Tools & Wizards About Us
kera.pbslearningmedia.org screenshot

Report Summary

  • 8

    Performance

    Renders faster than
    22% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

kera.pbslearningmedia.org

PBS LearningMedia | Teaching Resources For Students And Teachers

Page Load Speed

371 ms in total

First Response

8 ms

Resources Loaded

363 ms

Page Rendered

0 ms

kera.pbslearningmedia.org screenshot

About Website

Visit kera.pbslearningmedia.org now to see the best up-to-date Kera PBS Learning Media content for United States and also check out these interesting facts you probably never knew about kera.pbslearningmedia.org

Inspire your students with thousands of free teaching resources including videos, lesson plans, and games aligned to state and national standards.

Visit kera.pbslearningmedia.org

Key Findings

We analyzed Kera.pbslearningmedia.org page load time and found that the first response time was 8 ms and then it took 363 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

kera.pbslearningmedia.org performance score

8

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

33/100

10%

LCP (Largest Contentful Paint)

Value12.8 s

0/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value4,420 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.668

8/100

15%

TTI (Time to Interactive)

Value17.9 s

4/100

10%

Network Requests Diagram

kera.pbslearningmedia.org

8 ms

www.pbslearningmedia.org

66 ms

font-awesome.css

20 ms

jquery-3.2.1.min.js

28 ms

js.cookie.min.js

25 ms

Our browser made a total of 16 requests to load all elements on the main page. We found that 6% of them (1 request) were addressed to the original Kera.pbslearningmedia.org, 75% (12 requests) were made to Static.pbslearningmedia.org and 6% (1 request) were made to Pbslearningmedia.org. The less responsive or slowest element that took the longest time to load (138 ms) relates to the external source Googletagmanager.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 43.9 kB (6%)

Content Size

675.8 kB

After Optimization

631.9 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Kera.pbslearningmedia.org main page is 675.8 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Javascripts take 556.6 kB which makes up the majority of the site volume.

HTML Optimization

-67%

Potential reduce by 43.1 kB

  • Original 64.6 kB
  • After minification 64.5 kB
  • After compression 21.5 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 43.1 kB or 67% of the original size.

JavaScript Optimization

-0%

Potential reduce by 666 B

  • Original 556.6 kB
  • After minification 556.6 kB
  • After compression 556.0 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 65 B

  • Original 54.5 kB
  • After minification 54.5 kB
  • After compression 54.5 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Kera.pbslearningmedia.org has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 10 (71%)

Requests Now

14

After Optimization

4

  • JavaScript
  • CSS

The browser has sent 14 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kera PBS Learning Media. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

kera.pbslearningmedia.org

kera.pbslearningmedia.org

8 ms

www.pbslearningmedia.org

www.pbslearningmedia.org

66 ms

font-awesome.css

font-awesome.css

20 ms

jquery-3.2.1.min.js

jquery-3.2.1.min.js

28 ms

js.cookie.min.js

js.cookie.min.js

25 ms

utility.js

utility.js

25 ms

bootstrap-overrides.min.css

bootstrap-overrides.min.css

25 ms

popper.min.js

popper.min.js

27 ms

bootstrap.min.js

bootstrap.min.js

43 ms

polyfills.js

polyfills.js

49 ms

styles.css

styles.css

51 ms

main.js

main.js

69 ms

runtime.js

runtime.js

68 ms

vendor.js

vendor.js

72 ms

gtm.js

gtm.js

138 ms

pendo.js

pendo.js

22 ms

Accessibility Review

kera.pbslearningmedia.org accessibility score

89

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Links do not have a discernible name

Best Practices

kera.pbslearningmedia.org best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

kera.pbslearningmedia.org SEO score

93

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Kera.pbslearningmedia.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Kera.pbslearningmedia.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

kera.pbslearningmedia.org

Open Graph data is detected on the main page of Kera PBS Learning Media. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: