Tools & Wizards About Us
science4us.com screenshot

Report Summary

  • 39

    Performance

    Renders faster than
    58% of other websites

  • 97

    Accessibility

    Visual factors better than
    that of 92% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 97

    SEO

    Google-friendlier than
    91% of websites

science4us.com

Interactive K-2 Science Lessons | Science4us

Page Load Speed

947 ms in total

First Response

34 ms

Resources Loaded

752 ms

Page Rendered

161 ms

science4us.com screenshot

About Website

Welcome to science4us.com homepage info - get ready to check Science4us best content for United States right away, or after learning these important things about science4us.com

Give kids a head start in STEM with Science4Us. | ExploreLearning Science4Us

Visit science4us.com

Key Findings

We analyzed Science4us.com page load time and found that the first response time was 34 ms and then it took 913 ms 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

science4us.com performance score

39

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

54/100

10%

LCP (Largest Contentful Paint)

Value4.6 s

34/100

25%

SI (Speed Index)

Value4.6 s

71/100

10%

TBT (Total Blocking Time)

Value1,690 ms

11/100

30%

CLS (Cumulative Layout Shift)

Value0.1

89/100

15%

TTI (Time to Interactive)

Value13.5 s

11/100

10%

Network Requests Diagram

science4us.com

34 ms

www.science4us.com

362 ms

style.css

13 ms

sales-funnel.css

28 ms

bootstrap.css

36 ms

Our browser made a total of 55 requests to load all elements on the main page. We found that 82% of them (45 requests) were addressed to the original Science4us.com, 5% (3 requests) were made to Maxcdn.bootstrapcdn.com and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (362 ms) belongs to the original domain Science4us.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 501.4 kB (40%)

Content Size

1.2 MB

After Optimization

743.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Science4us.com main page is 1.2 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. 60% of websites need less resources to load. Images take 566.8 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 38.0 kB

  • Original 49.9 kB
  • After minification 47.1 kB
  • After compression 11.9 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 38.0 kB or 76% of the original size.

Image Optimization

-4%

Potential reduce by 22.8 kB

  • Original 566.8 kB
  • After minification 544.0 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. Science4us images are well optimized though.

JavaScript Optimization

-58%

Potential reduce by 202.8 kB

  • Original 349.7 kB
  • After minification 332.6 kB
  • After compression 146.9 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 202.8 kB or 58% of the original size.

CSS Optimization

-85%

Potential reduce by 237.8 kB

  • Original 278.8 kB
  • After minification 214.9 kB
  • After compression 41.0 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. Science4us.com needs all CSS files to be minified and compressed as it can save up to 237.8 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 26 (51%)

Requests Now

51

After Optimization

25

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 51 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Science4us. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

science4us.com

science4us.com

34 ms

www.science4us.com

www.science4us.com

362 ms

style.css

style.css

13 ms

sales-funnel.css

sales-funnel.css

28 ms

bootstrap.css

bootstrap.css

36 ms

slidebars.css

slidebars.css

34 ms

style-my-tooltips.css

style-my-tooltips.css

34 ms

magnific.css

magnific.css

40 ms

slidebars.css

slidebars.css

31 ms

font-awesome.min.css

font-awesome.min.css

66 ms

jquery.js

jquery.js

53 ms

jquery-migrate.min.js

jquery-migrate.min.js

52 ms

jquery.min.js

jquery.min.js

107 ms

jquery.style-my-tooltips.js

jquery.style-my-tooltips.js

50 ms

jqueryslidemenu.js

jqueryslidemenu.js

54 ms

swfobject20.js

swfobject20.js

51 ms

jcarousellite_1.0.1.min.js

jcarousellite_1.0.1.min.js

58 ms

mobile-detection.js

mobile-detection.js

57 ms

flash_detect_min.js

flash_detect_min.js

56 ms

demo-onload.js

demo-onload.js

57 ms

slidebars.js

slidebars.js

55 ms

magnific.js

magnific.js

59 ms

jquery.tooltip.min.js

jquery.tooltip.min.js

86 ms

psmm-public.js

psmm-public.js

86 ms

slidebars.min.js

slidebars.min.js

81 ms

conversion.js

conversion.js

55 ms

bootstrap.min.js

bootstrap.min.js

81 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

39 ms

bg_home-topper-repeat.jpg

bg_home-topper-repeat.jpg

84 ms

ga.js

ga.js

73 ms

101 ms

liveadmin.php

liveadmin.php

217 ms

bg_main-header.jpg

bg_main-header.jpg

37 ms

Logo_Science4us.png

Logo_Science4us.png

42 ms

s4u-mobile-logo.png

s4u-mobile-logo.png

40 ms

bg_login-logout.png

bg_login-logout.png

37 ms

physicalDemoMenu.gif

physicalDemoMenu.gif

37 ms

inquiryDemoMenu.gif

inquiryDemoMenu.gif

39 ms

lifeDemoMenu.gif

lifeDemoMenu.gif

41 ms

earthDemoMenu.gif

earthDemoMenu.gif

41 ms

bg_home-topper.jpg

bg_home-topper.jpg

42 ms

girl-magnifying-glass.png

girl-magnifying-glass.png

59 ms

homeslider-litandmathskills.png

homeslider-litandmathskills.png

40 ms

homeslider-stemskills.png

homeslider-stemskills.png

61 ms

homeslider-handson.png

homeslider-handson.png

43 ms

homeslider-whyteacherslove.png

homeslider-whyteacherslove.png

44 ms

Mcrel-Logo.png

Mcrel-Logo.png

42 ms

divider_vertical.png

divider_vertical.png

45 ms

microscopeSM.png

microscopeSM.png

45 ms

hillcrest-elem-logo.png

hillcrest-elem-logo.png

47 ms

at-a-glance-icon.png

at-a-glance-icon.png

46 ms

bg-gradient.jpg

bg-gradient.jpg

47 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

33 ms

__utm.gif

__utm.gif

28 ms

37 ms

Accessibility Review

science4us.com accessibility score

97

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

science4us.com 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

High

Page has valid source maps

SEO Factors

science4us.com SEO score

97

Search Engine Optimization Advices

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

High

Tap targets are not sized appropriately

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 Science4us.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 Science4us.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

science4us.com

Open Graph description is not detected on the main page of Science4us. 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: