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pltw.org screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

pltw.org

Where STEM Curriculum Meets Career Readiness | PLTW

Page Load Speed

1.9 sec in total

First Response

129 ms

Resources Loaded

1.4 sec

Page Rendered

323 ms

pltw.org screenshot

About Website

Visit pltw.org now to see the best up-to-date PLTW content for United States and also check out these interesting facts you probably never knew about pltw.org

Get access to PreK-12 STEM curriculum to transform your classroom, prepare your students for their career, and earn in-demand teaching credentials.

Visit pltw.org

Key Findings

We analyzed Pltw.org page load time and found that the first response time was 129 ms and then it took 1.8 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

pltw.org performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

33/100

10%

LCP (Largest Contentful Paint)

Value16.5 s

0/100

25%

SI (Speed Index)

Value8.1 s

20/100

10%

TBT (Total Blocking Time)

Value3,150 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value17.9 s

4/100

10%

Network Requests Diagram

www.pltw.org

129 ms

cloudflare.min.js

43 ms

appsh.min.js

89 ms

ss-social.css

43 ms

ss-standard.css

93 ms

Our browser made a total of 64 requests to load all elements on the main page. We found that 69% of them (44 requests) were addressed to the original Pltw.org, 5% (3 requests) were made to Ajax.cloudflare.com and 5% (3 requests) were made to Cdnjs.cloudflare.com. The less responsive or slowest element that took the longest time to load (424 ms) relates to the external source Pi.pardot.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 658.1 kB (29%)

Content Size

2.2 MB

After Optimization

1.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Pltw.org main page is 2.2 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 1.4 MB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 23.7 kB

  • Original 31.4 kB
  • After minification 31.4 kB
  • After compression 7.7 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 23.7 kB or 75% of the original size.

Image Optimization

-3%

Potential reduce by 42.8 kB

  • Original 1.4 MB
  • After minification 1.3 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. PLTW images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 273.0 kB

  • Original 430.8 kB
  • After minification 416.0 kB
  • After compression 157.8 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 273.0 kB or 63% of the original size.

CSS Optimization

-75%

Potential reduce by 318.6 kB

  • Original 424.7 kB
  • After minification 422.7 kB
  • After compression 106.0 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. Pltw.org needs all CSS files to be minified and compressed as it can save up to 318.6 kB or 75% of the original size.

Requests Breakdown

Number of requests can be reduced by 39 (70%)

Requests Now

56

After Optimization

17

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 56 CSS, Javascripts, AJAX and image requests in order to completely render the main page of PLTW. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 22 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.pltw.org

www.pltw.org

129 ms

cloudflare.min.js

cloudflare.min.js

43 ms

appsh.min.js

appsh.min.js

89 ms

ss-social.css

ss-social.css

43 ms

ss-standard.css

ss-standard.css

93 ms

jquery.ui.core.css

jquery.ui.core.css

97 ms

jquery-ui.css

jquery-ui.css

107 ms

system.base.css

system.base.css

116 ms

jquery.ui.accordion.css

jquery.ui.accordion.css

119 ms

jquery.ui.tabs.css

jquery.ui.tabs.css

115 ms

comment.css

comment.css

93 ms

date.css

date.css

105 ms

datepicker.1.7.css

datepicker.1.7.css

114 ms

field.css

field.css

114 ms

mollom.css

mollom.css

114 ms

node.css

node.css

114 ms

search.css

search.css

120 ms

user.css

user.css

120 ms

views.css

views.css

117 ms

ctools.css

ctools.css

133 ms

panels.css

panels.css

118 ms

wysiwyg_linebreaks.css

wysiwyg_linebreaks.css

133 ms

pltw-touchups.css

pltw-touchups.css

132 ms

styles.css

styles.css

142 ms

js_8Cu_vsfN8txVqXXlYdP0IG4_QMe6aiAuM2wcy4McuDI.js

js_8Cu_vsfN8txVqXXlYdP0IG4_QMe6aiAuM2wcy4McuDI.js

146 ms

js_9RXYA97Wwzkd08NL3FtdaymiF45jjvCWosCLyk6j6gk.js

js_9RXYA97Wwzkd08NL3FtdaymiF45jjvCWosCLyk6j6gk.js

133 ms

js_LS16bLP8BePqL8wZLkTj2bLLyTXXqVzFqDl-427OJOY.js

js_LS16bLP8BePqL8wZLkTj2bLLyTXXqVzFqDl-427OJOY.js

132 ms

js_p47-Jib1KHrMXQC1qPiHJDHH8xHF89rw-oGYMYHTju0.js

js_p47-Jib1KHrMXQC1qPiHJDHH8xHF89rw-oGYMYHTju0.js

144 ms

rjq7jzq.js

rjq7jzq.js

193 ms

js_7h324ifclLGYFxFoatQ4-wnM2It7bPCH8oukRlW-nkY.js

js_7h324ifclLGYFxFoatQ4-wnM2It7bPCH8oukRlW-nkY.js

162 ms

js_O6Aayvd5E5F__RbUFkAFLn6TfdPAfTWNyn5dxZgW3EA.js

js_O6Aayvd5E5F__RbUFkAFLn6TfdPAfTWNyn5dxZgW3EA.js

143 ms

apps1.min.js

apps1.min.js

84 ms

modernizr.min.js

modernizr.min.js

35 ms

json2.js

json2.js

50 ms

bag2

bag2

54 ms

analytics.js

analytics.js

265 ms

pltw-tile.png

pltw-tile.png

217 ms

al65aeTBKNE

al65aeTBKNE

304 ms

flexie.min.js

flexie.min.js

56 ms

pltw-logo.svg

pltw-logo.svg

167 ms

icon--search-large-view.png

icon--search-large-view.png

174 ms

Summit%20092315_1.png

Summit%20092315_1.png

233 ms

022015_Girls-In-STEM.png

022015_Girls-In-STEM.png

231 ms

032015%20March%20Madness.jpg

032015%20March%20Madness.jpg

171 ms

autodesk.png

autodesk.png

173 ms

chevron.png

chevron.png

175 ms

kern.png

kern.png

175 ms

Lockheed_Martin_changed.png

Lockheed_Martin_changed.png

175 ms

background-tile.png

background-tile.png

176 ms

north-america.png

north-america.png

177 ms

bag2

bag2

177 ms

ss-standard.woff

ss-standard.woff

179 ms

P8PJBAsIAAAnsoHawAAAAEAAAAAzBdyYwAAAADMQjnkAAAAAMxJVR4=

P8PJBAsIAAAnsoHawAAAAEAAAAAzBdyYwAAAADMQjnkAAAAAMxJVR4=

5 ms

ss-social-circle.woff

ss-social-circle.woff

227 ms

collect

collect

21 ms

collect

collect

67 ms

www-embed-player-vflZsBgOl.css

www-embed-player-vflZsBgOl.css

73 ms

www-embed-player.js

www-embed-player.js

94 ms

base.js

base.js

165 ms

yrK4EqpSRdoujKQmsJoZ5WaLgeULvcWnibQMQSxOOnM.js

yrK4EqpSRdoujKQmsJoZ5WaLgeULvcWnibQMQSxOOnM.js

42 ms

ad_status.js

ad_status.js

42 ms

CrYjSnGjrRCn0pd9VQsnFOvvDin1pK8aKteLpeZ5c0A.woff

CrYjSnGjrRCn0pd9VQsnFOvvDin1pK8aKteLpeZ5c0A.woff

81 ms

RxZJdnzeo3R5zSexge8UUbO3LdcAZYWl9Si6vvxL-qU.woff

RxZJdnzeo3R5zSexge8UUbO3LdcAZYWl9Si6vvxL-qU.woff

89 ms

pd.js

pd.js

424 ms

Accessibility Review

pltw.org accessibility score

75

Accessibility Issues

ARIA

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.

Impact

Issue

High

[aria-*] attributes do not match their roles

High

[aria-*] attributes are not valid or misspelled

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

pltw.org best practices score

75

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

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

pltw.org SEO score

84

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

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 Pltw.org 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 Pltw.org 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

pltw.org

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