Access lehrer-online.de. Lehrer-Online: Arbeitsblätter, Unterrichtsmaterial, Entwürfe

Report Summary

About Website

Welcome to lehrer-online.de homepage info - get ready to check Lehrer Online best content for Germany right away, or after learning these important things about lehrer-online.de

20.000 qualitätsgesicherte Unterrichtsmaterialien für Lehrer und Referendare: Stundenverlauf, Methodenvorschlag, Arbeitsblätter zum Download.

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name

value

score

weighting

FCP (First Contentful Paint)

Value15.1 s

0/100

10%

LCP (Largest Contentful Paint)

Value40.1 s

0/100

25%

SI (Speed Index)

Value18.9 s

0/100

10%

TBT (Total Blocking Time)

Value900 ms

31/100

30%

CLS (Cumulative Layout Shift)

Value0.007

100/100

15%

TTI (Time to Interactive)

Value35.2 s

0/100

10%

lehrer-online.de

399 ms

lehrer-online.de

401 ms

www.lehrer-online.de

1063 ms

screen.css

4081 ms

flexslider.css

296 ms

Our browser made a total of 71 requests to load all elements on the main page. We found that 80% of them (57 requests) were addressed to the original Lehrer-online.de, 11% (8 requests) were made to Lehreronline.adspirit.de and 3% (2 requests) were made to Cdn.adspirit.de. The less responsive or slowest element that took the longest time to load (4.1 sec) belongs to the original domain Lehrer-online.de.

Content Size

12.8 MB

After Optimization

8.4 MB

In fact, the total size of Lehrer-online.de main page is 12.8 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 55% of websites need less resources to load. Images take 8.5 MB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 164.6 kB

Original 187.9 kB
After minification 148.6 kB
After compression 23.3 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 39.3 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 164.6 kB or 88% of the original size.

Image Optimization

-6%

Potential reduce by 533.4 kB

Original 8.5 MB
After minification 8.0 MB

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. Lehrer Online images are well optimized though.

JavaScript Optimization

-76%

Potential reduce by 1.3 MB

Original 1.7 MB
After minification 1.7 MB
After compression 408.4 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 1.3 MB or 76% of the original size.

CSS Optimization

-100%

Potential reduce by 2.3 MB

Original 2.3 MB
After minification 16.9 kB
After compression 3.2 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. Lehrer-online.de needs all CSS files to be minified and compressed as it can save up to 2.3 MB or 100% of the original size.

Requests Now

After Optimization

The browser has sent 65 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lehrer Online. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 29 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

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 experience of reading tabular or list data using assistive technology, like a screen reader.

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

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

DE
Language Claimed

DE
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Lehrer-online.de can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and it matches the claimed language. Our system also found out that Lehrer-online.de 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

lehrer-online.de

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

Report Summary

Performance

Accessibility

Best Practices

SEO

Lehrer-Online: Arbeitsblätter, Unterrichtsmaterial, Entwürfe

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

lehrer-online.de

lehrer-online.de

www.lehrer-online.de

screen.css

flexslider.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

lehrer-online.de

lehrer-online.de

www.lehrer-online.de

screen.css

flexslider.css

mods.css

cookieOptin.css

cookieOptin.js

adasync.min.js

lp.ext.js

modernizr.js

shave.js

Main.js

foundation.js

PopupBanner.js

PageElements.js

d6667e6ad9.js

paymill_payment_token.js

BrandDetection.js

Iban.js

jquery.datetimepicker.min.js

parsley.min.js

Tabs.min.js

Form.min.js

jquery.flexslider-min.js

LehrerOnline.js

jqmath-etc-0.4.6.min.js

matomo.js

lehreronline_logo_blau_grau.svg

lehrer-online-logo-no-url.svg

black-arrow-down.png

check_mark_blue.svg

search-icon-white.svg

startseiten-banner.png

scham-ekel-AdobeStock_647380437.jpeg

blut-biologie-AdobeStock-478987727.jpeg

Insektenstiche-AdobeStock_72012651.jpeg

ernaehrung-im-erwachsenenalter-AdobeStock_218475789.jpeg

Dirk_Laemmche_Testimonial.jpg

csm_georg-hoffmann-junge-philologen-305x388_403ad8f1d2.jpg

csm_Yasmin-Rosengarten-Foto_f917f2e49a.jpg

csm_Juliane-Sorg-Autorin-bei-Lehrer-Online-390x430_f90d78254c.jpg

csm_Tobias_Huebner_a91c2ad231.jpeg