Report Summary

  • 78

    Performance

    Renders faster than
    85% of other websites

  • 71

    Accessibility

    Visual factors better than
    that of 36% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

teachers.io

Teachers.io

Page Load Speed

607 ms in total

First Response

32 ms

Resources Loaded

266 ms

Page Rendered

309 ms

teachers.io screenshot

About Website

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

Teachers.io is an app where teachers can organize and share their class information. Available in the app store!

Visit teachers.io

Key Findings

We analyzed Teachers.io page load time and found that the first response time was 32 ms and then it took 575 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

teachers.io performance score

78

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

74/100

10%

LCP (Largest Contentful Paint)

Value4.9 s

28/100

25%

SI (Speed Index)

Value2.3 s

99/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.013

100/100

15%

TTI (Time to Interactive)

Value4.4 s

84/100

10%

Network Requests Diagram

teachers.io

32 ms

teachers.io

26 ms

u-1.6.23.css

29 ms

jquery.min.js

23 ms

jquery-ui.min.js

27 ms

Our browser made a total of 17 requests to load all elements on the main page. We found that 12% of them (2 requests) were addressed to the original Teachers.io, 65% (11 requests) were made to D1ec4mget7355z.cloudfront.net and 12% (2 requests) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (145 ms) relates to the external source D1ec4mget7355z.cloudfront.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 172.8 kB (30%)

Content Size

568.1 kB

After Optimization

395.3 kB

In fact, the total size of Teachers.io main page is 568.1 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. 30% of websites need less resources to load. Images take 237.4 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 10.8 kB

  • Original 14.8 kB
  • After minification 13.6 kB
  • After compression 4.0 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 10.8 kB or 73% of the original size.

Image Optimization

-0%

Potential reduce by 545 B

  • Original 237.4 kB
  • After minification 236.9 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. Teachers images are well optimized though.

JavaScript Optimization

-26%

Potential reduce by 46.0 kB

  • Original 173.6 kB
  • After minification 173.5 kB
  • After compression 127.7 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 46.0 kB or 26% of the original size.

CSS Optimization

-81%

Potential reduce by 115.5 kB

  • Original 142.2 kB
  • After minification 142.2 kB
  • After compression 26.8 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. Teachers.io needs all CSS files to be minified and compressed as it can save up to 115.5 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (21%)

Requests Now

14

After Optimization

11

The browser has sent 14 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Teachers. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

teachers.io accessibility score

71

Accessibility Issues

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.

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

Image elements do not have [alt] attributes

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

teachers.io 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

SEO Factors

teachers.io SEO score

92

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

Image elements do not have [alt] attributes

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 Teachers.io 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 Teachers.io 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

Open Graph description is not detected on the main page of Teachers. 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: