Tools & Wizards About Us
middleschoolchemistry.com screenshot

Report Summary

  • 24

    Performance

    Renders faster than
    43% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

middleschoolchemistry.com

Middle School Chemistry - American Chemical Society

Page Load Speed

747 ms in total

First Response

74 ms

Resources Loaded

446 ms

Page Rendered

227 ms

middleschoolchemistry.com screenshot

About Website

Click here to check amazing Middle School Chemistry content for United States. Otherwise, check out these important facts you probably never knew about middleschoolchemistry.com

Middle School Chemistry provides free science activities, multimedia, and information about upcoming workshops offered by the American Chemical Society for middle school science teachers

Visit middleschoolchemistry.com

Key Findings

We analyzed Middleschoolchemistry.com page load time and found that the first response time was 74 ms and then it took 673 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.

Performance Metrics

middleschoolchemistry.com performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

68/100

10%

LCP (Largest Contentful Paint)

Value6.0 s

13/100

25%

SI (Speed Index)

Value2.9 s

95/100

10%

TBT (Total Blocking Time)

Value3,120 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.425

22/100

15%

TTI (Time to Interactive)

Value14.1 s

9/100

10%

Network Requests Diagram

middleschoolchemistry.com

74 ms

www.middleschoolchemistry.com

121 ms

reset.css

6 ms

index.css

8 ms

jquery-1.10.2.min.js

11 ms

Our browser made a total of 28 requests to load all elements on the main page. We found that 86% of them (24 requests) were addressed to the original Middleschoolchemistry.com, 7% (2 requests) were made to Google-analytics.com and 4% (1 request) were made to Assets.acs.org. The less responsive or slowest element that took the longest time to load (121 ms) belongs to the original domain Middleschoolchemistry.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 182.5 kB (25%)

Content Size

744.4 kB

After Optimization

561.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Middleschoolchemistry.com main page is 744.4 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. 45% of websites need less resources to load. Images take 476.6 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 15.7 kB

  • Original 20.4 kB
  • After minification 18.6 kB
  • After compression 4.7 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 15.7 kB or 77% of the original size.

Image Optimization

-5%

Potential reduce by 23.8 kB

  • Original 476.6 kB
  • After minification 452.9 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. Middle School Chemistry images are well optimized though.

JavaScript Optimization

-57%

Potential reduce by 132.8 kB

  • Original 234.5 kB
  • After minification 210.9 kB
  • After compression 101.7 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 132.8 kB or 57% of the original size.

CSS Optimization

-80%

Potential reduce by 10.1 kB

  • Original 12.7 kB
  • After minification 9.2 kB
  • After compression 2.6 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. Middleschoolchemistry.com needs all CSS files to be minified and compressed as it can save up to 10.1 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (24%)

Requests Now

25

After Optimization

19

  • Images
  • JavaScript
  • CSS

The browser has sent 25 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Middle School Chemistry. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

middleschoolchemistry.com

middleschoolchemistry.com

74 ms

www.middleschoolchemistry.com

www.middleschoolchemistry.com

121 ms

reset.css

reset.css

6 ms

index.css

index.css

8 ms

jquery-1.10.2.min.js

jquery-1.10.2.min.js

11 ms

index.js

index.js

5 ms

cufon-yui.js

cufon-yui.js

22 ms

MEgalopolis_Extra_900.font.js

MEgalopolis_Extra_900.font.js

23 ms

jquery.bxslider.js

jquery.bxslider.js

7 ms

s_code.js

s_code.js

96 ms

ga.js

ga.js

34 ms

bg-body_index.jpg

bg-body_index.jpg

9 ms

bg-wrapper_branding_line.gif

bg-wrapper_branding_line.gif

8 ms

bg-header_branding_line.gif

bg-header_branding_line.gif

9 ms

acs_logo.png

acs_logo.png

12 ms

bg-middle_school_chemistry_alt.png

bg-middle_school_chemistry_alt.png

10 ms

student_views_drop.gif

student_views_drop.gif

13 ms

teacher_and_board.png

teacher_and_board.png

23 ms

two_students.gif

two_students.gif

14 ms

bg-se_habla_espanol.gif

bg-se_habla_espanol.gif

19 ms

bg-facebook_icon.jpg

bg-facebook_icon.jpg

14 ms

sp-activity_numbers.png

sp-activity_numbers.png

18 ms

bg-download_the_book.gif

bg-download_the_book.gif

19 ms

webby_award_nominee.png

webby_award_nominee.png

18 ms

__utm.gif

__utm.gif

51 ms

bx_loader.gif

bx_loader.gif

7 ms

student_views_drop.gif

student_views_drop.gif

4 ms

s76253022314049

s76253022314049

47 ms

Accessibility Review

middleschoolchemistry.com accessibility score

84

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[accesskey] values are not unique

High

Heading elements are not in a sequentially-descending order

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.

Best Practices

middleschoolchemistry.com best practices score

58

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

middleschoolchemistry.com SEO score

62

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

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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 Middleschoolchemistry.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 Middleschoolchemistry.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

middleschoolchemistry.com

Open Graph description is not detected on the main page of Middle School Chemistry. 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: