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teachersfirst.com screenshot

Report Summary

  • 85

    Performance

    Renders faster than
    88% of other websites

  • 58

    Accessibility

    Visual factors better than
    that of 25% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 66

    SEO

    Google-friendlier than
    25% of websites

teachersfirst.com

TeachersFirst: The web resource by teachers, for teachers

Page Load Speed

979 ms in total

First Response

71 ms

Resources Loaded

807 ms

Page Rendered

101 ms

teachersfirst.com screenshot

About Website

Click here to check amazing Teachers First content for United States. Otherwise, check out these important facts you probably never knew about teachersfirst.com

TeachersFirst is Thinking Teachers, Teaching Thinkers. TeachersFirst offers a rich collection of lessons, units, and educator-reviewed web resources designed to save teachers time by delivering just w...

Visit teachersfirst.com

Key Findings

We analyzed Teachersfirst.com page load time and found that the first response time was 71 ms and then it took 908 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

teachersfirst.com performance score

85

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.1 s

82/100

10%

LCP (Largest Contentful Paint)

Value3.2 s

74/100

25%

SI (Speed Index)

Value2.3 s

99/100

10%

TBT (Total Blocking Time)

Value210 ms

88/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value5.6 s

69/100

10%

Network Requests Diagram

teachersfirst.com

71 ms

teachersfirst.com

457 ms

gtm.js

112 ms

style.css

34 ms

tf3emin.css

42 ms

Our browser made a total of 29 requests to load all elements on the main page. We found that 69% of them (20 requests) were addressed to the original Teachersfirst.com, 14% (4 requests) were made to Static.addtoany.com and 7% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (457 ms) belongs to the original domain Teachersfirst.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 241.6 kB (59%)

Content Size

408.3 kB

After Optimization

166.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Teachersfirst.com main page is 408.3 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. 50% of websites need less resources to load. Javascripts take 185.2 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 64.2 kB

  • Original 81.1 kB
  • After minification 64.1 kB
  • After compression 16.8 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. This page needs HTML code to be minified as it can gain 17.0 kB, which is 21% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 64.2 kB or 79% of the original size.

Image Optimization

-93%

Potential reduce by 118.5 kB

  • Original 127.4 kB
  • After minification 8.9 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Teachers First needs image optimization as it can save up to 118.5 kB or 93% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-31%

Potential reduce by 56.8 kB

  • Original 185.2 kB
  • After minification 185.2 kB
  • After compression 128.4 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 56.8 kB or 31% of the original size.

CSS Optimization

-14%

Potential reduce by 2.1 kB

  • Original 14.6 kB
  • After minification 14.6 kB
  • After compression 12.6 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. Teachersfirst.com needs all CSS files to be minified and compressed as it can save up to 2.1 kB or 14% of the original size.

Requests Breakdown

Number of requests can be reduced by 15 (56%)

Requests Now

27

After Optimization

12

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 27 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Teachers First. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

teachersfirst.com

teachersfirst.com

71 ms

teachersfirst.com

teachersfirst.com

457 ms

gtm.js

gtm.js

112 ms

style.css

style.css

34 ms

tf3emin.css

tf3emin.css

42 ms

foundation-icons.css

foundation-icons.css

39 ms

modernizr-1.6.min.js

modernizr-1.6.min.js

41 ms

page.js

page.js

70 ms

jquery.js

jquery.js

50 ms

anythingslider.css

anythingslider.css

49 ms

jquery.anythingslider.js

jquery.anythingslider.js

58 ms

twitterFetcher.js

twitterFetcher.js

60 ms

plugins.js

plugins.js

58 ms

script.js

script.js

60 ms

tf_logo_stroke.png

tf_logo_stroke.png

69 ms

_71658598.png

_71658598.png

72 ms

star_large.png

star_large.png

69 ms

icon_sprite_xlarge.png

icon_sprite_xlarge.png

69 ms

icon_sprite_small.png

icon_sprite_small.png

70 ms

blank.gif

blank.gif

70 ms

new_window_icon.gif

new_window_icon.gif

71 ms

poll.php

poll.php

66 ms

sm.25.html

sm.25.html

48 ms

eso.BRQnzO8v.js

eso.BRQnzO8v.js

51 ms

js

js

55 ms

analytics.js

analytics.js

33 ms

icons.38.svg.js

icons.38.svg.js

32 ms

tfprint.css

tfprint.css

23 ms

collect

collect

86 ms

Accessibility Review

teachersfirst.com accessibility score

58

Accessibility Issues

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

Best Practices

teachersfirst.com best practices score

75

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

Browser errors were logged to the console

SEO Factors

teachersfirst.com SEO score

66

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

High

robots.txt is not valid

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

High

Tap targets are not sized appropriately

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 Teachersfirst.com 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 Teachersfirst.com 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

teachersfirst.com

Open Graph description is not detected on the main page of Teachers First. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: