Tools & Wizards About Us

Report Summary

  • 86

    Performance

    Renders faster than
    89% of other websites

  • 49

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

teachsam.de

teachSam-Startseite

Page Load Speed

1.3 sec in total

First Response

272 ms

Resources Loaded

856 ms

Page Rendered

219 ms

About Website

Click here to check amazing TeachSam content for Germany. Otherwise, check out these important facts you probably never knew about teachsam.de

teachSam-OER ist ein Bildungsserver mit Unterrichtsmaterialien in den Fchern Deutsch, Geschichte, Politik fr die Sekundarstufe I und II

Visit teachsam.de

Key Findings

We analyzed Teachsam.de page load time and found that the first response time was 272 ms and then it took 1.1 sec 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

teachsam.de performance score

86

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.8 s

88/100

10%

LCP (Largest Contentful Paint)

Value2.9 s

80/100

25%

SI (Speed Index)

Value2.1 s

99/100

10%

TBT (Total Blocking Time)

Value200 ms

90/100

30%

CLS (Cumulative Layout Shift)

Value0.133

81/100

15%

TTI (Time to Interactive)

Value4.7 s

80/100

10%

Network Requests Diagram

teachsam.de

272 ms

gtm.js

58 ms

css_1.css

107 ms

css_11.css

216 ms

uc.js

26 ms

Our browser made a total of 22 requests to load all elements on the main page. We found that 41% of them (9 requests) were addressed to the original Teachsam.de, 9% (2 requests) were made to Pagead2.googlesyndication.com and 9% (2 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (312 ms) relates to the external source Pagead2.googlesyndication.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 67.7 kB (19%)

Content Size

362.9 kB

After Optimization

295.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Teachsam.de main page is 362.9 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. 20% of websites need less resources to load. Javascripts take 272.4 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 56.8 kB

  • Original 68.1 kB
  • After minification 61.2 kB
  • After compression 11.2 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 56.8 kB or 84% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 21.0 kB
  • After minification 21.0 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. TeachSam images are well optimized though.

JavaScript Optimization

-4%

Potential reduce by 9.6 kB

  • Original 272.4 kB
  • After minification 272.4 kB
  • After compression 262.7 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. This website has mostly compressed JavaScripts.

CSS Optimization

-82%

Potential reduce by 1.2 kB

  • Original 1.5 kB
  • After minification 1.2 kB
  • After compression 279 B

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. Teachsam.de needs all CSS files to be minified and compressed as it can save up to 1.2 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 4 (25%)

Requests Now

16

After Optimization

12

  • Images
  • JavaScript
  • CSS

The browser has sent 16 CSS, Javascripts, AJAX and image requests in order to completely render the main page of TeachSam. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

teachsam.de accessibility score

49

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

teachsam.de best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

teachsam.de SEO score

69

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

Language and Encoding

  • Language Detected

    DE

  • Language Claimed

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Teachsam.de can be misinterpreted by Google and other search engines. Our service has detected that German 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 Teachsam.de main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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