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name

value

score

weighting

FCP (First Contentful Paint)

Value2.4 s

69/100

10%

LCP (Largest Contentful Paint)

Value4.5 s

38/100

25%

SI (Speed Index)

Value2.4 s

98/100

10%

TBT (Total Blocking Time)

Value830 ms

35/100

30%

CLS (Cumulative Layout Shift)

Value0.029

100/100

15%

TTI (Time to Interactive)

Value9.0 s

34/100

10%

teacher.com

19 ms

gtm.js

53 ms

Our browser made a total of 2 requests to load all elements on the main page. We found that 50% of them (1 request) were addressed to the original Teacher.com, 50% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (53 ms) relates to the external source Googletagmanager.com.

Content Size

722.0 kB

After Optimization

486.2 kB

In fact, the total size of Teacher.com main page is 722.0 kB. This result falls within the top 5000 of lightweight and thus fast loading web pages. Only a small number of websites need less resources to load. Images take 424.4 kB which makes up the majority of the site volume.

HTML Optimization

-49%

Potential reduce by 504 B

Original 1.0 kB
After minification 862 B
After compression 517 B

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 159 B, which is 16% 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 504 B or 49% of the original size.

Image Optimization

-5%

Potential reduce by 19.2 kB

Original 424.4 kB
After minification 405.2 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. Teacher images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 109.8 kB

Original 167.7 kB
After minification 161.1 kB
After compression 57.9 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 109.8 kB or 65% of the original size.

CSS Optimization

-82%

Potential reduce by 106.3 kB

Original 128.9 kB
After minification 126.5 kB
After compression 22.6 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. Teacher.com needs all CSS files to be minified and compressed as it can save up to 106.3 kB or 82% of the original size.

Requests Now

After Optimization

The browser has sent 1 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Teacher. According to our analytics all requests are already optimized.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

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

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.

High

ARIA IDs are not unique

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.

High

Links do not have a discernible name

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

Search Engine Optimization Advices

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

High

Links are not crawlable

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/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

EN
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Teacher.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Teacher.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

teacher.com

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