Tools & Wizards About Us
teacherscollege.edu screenshot

Report Summary

  • 10

    Performance

    Renders faster than
    23% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 81% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

teacherscollege.edu

Graduate School of Education | Teachers College, Columbia University

Page Load Speed

2.9 sec in total

First Response

20 ms

Resources Loaded

1.5 sec

Page Rendered

1.4 sec

teacherscollege.edu screenshot

About Website

Visit teacherscollege.edu now to see the best up-to-date Teachers College content and also check out these interesting facts you probably never knew about teacherscollege.edu

Teachers College, Columbia University, is the first and largest graduate school of education in the United States, and also perennially ranked among the nation's best.

Visit teacherscollege.edu

Key Findings

We analyzed Teacherscollege.edu page load time and found that the first response time was 20 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

teacherscollege.edu performance score

10

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

20/100

10%

LCP (Largest Contentful Paint)

Value17.6 s

0/100

25%

SI (Speed Index)

Value9.7 s

10/100

10%

TBT (Total Blocking Time)

Value1,410 ms

15/100

30%

CLS (Cumulative Layout Shift)

Value0.548

13/100

15%

TTI (Time to Interactive)

Value23.2 s

1/100

10%

Network Requests Diagram

teacherscollege.edu

20 ms

www.tc.columbia.edu

60 ms

gtm.js

368 ms

ping

361 ms

styles.css

30 ms

Our browser made a total of 72 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Teacherscollege.edu, 63% (45 requests) were made to Tc.columbia.edu and 8% (6 requests) were made to T4.tc.columbia.edu. The less responsive or slowest element that took the longest time to load (507 ms) relates to the external source Tc.columbia.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 346.9 kB (3%)

Content Size

9.9 MB

After Optimization

9.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Teacherscollege.edu main page is 9.9 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. Only a small number of websites need less resources to load. Images take 9.4 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 133.6 kB

  • Original 157.2 kB
  • After minification 142.3 kB
  • After compression 23.7 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 133.6 kB or 85% of the original size.

Image Optimization

-2%

Potential reduce by 209.6 kB

  • Original 9.4 MB
  • After minification 9.2 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. Teachers College images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 3.6 kB

  • Original 233.0 kB
  • After minification 232.0 kB
  • After compression 229.5 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

-0%

Potential reduce by 157 B

  • Original 83.2 kB
  • After minification 83.2 kB
  • After compression 83.1 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. Teacherscollege.edu has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 13 (22%)

Requests Now

60

After Optimization

47

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 60 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Teachers College. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

teacherscollege.edu

teacherscollege.edu

20 ms

www.tc.columbia.edu

www.tc.columbia.edu

60 ms

gtm.js

gtm.js

368 ms

ping

ping

361 ms

styles.css

styles.css

30 ms

bundle.js

bundle.js

67 ms

2.6.14.min.js

2.6.14.min.js

62 ms

Primary-Logo_Left-Aligned_White@2x.png

Primary-Logo_Left-Aligned_White@2x.png

299 ms

impact-day-hero-revised.jpg

impact-day-hero-revised.jpg

345 ms

Mabel_Pin-Hua_Lee_Web_Hero_1200x800.jpg

Mabel_Pin-Hua_Lee_Web_Hero_1200x800.jpg

345 ms

MODES-hero.jpg

MODES-hero.jpg

344 ms

Harlem-artist-collage-hero-1.jpg

Harlem-artist-collage-hero-1.jpg

390 ms

iStock-1716929313.jpg

iStock-1716929313.jpg

444 ms

Apply-Now-2024-02.jpg

Apply-Now-2024-02.jpg

507 ms

Diversity_At_TC_Image_1200x800.jpg

Diversity_At_TC_Image_1200x800.jpg

391 ms

Extended_Neighborhood_Image_1200x800.jpg

Extended_Neighborhood_Image_1200x800.jpg

406 ms

Visit_Campus_Image_1200x800.jpg

Visit_Campus_Image_1200x800.jpg

397 ms

Primary-Logo_1-Line-Centered_White@2x.png

Primary-Logo_1-Line-Centered_White@2x.png

407 ms

social-feed-v2.php

social-feed-v2.php

455 ms

Education_Image_1200x800.jpg

Education_Image_1200x800.jpg

292 ms

Health_Image_1200x800.jpg

Health_Image_1200x800.jpg

297 ms

Psychology_Image_1200x800.jpg

Psychology_Image_1200x800.jpg

300 ms

View_All_Image_1200x800.jpg

View_All_Image_1200x800.jpg

298 ms

New_Brand_Site_Hero_final.jpg

New_Brand_Site_Hero_final.jpg

322 ms

Blue_Textured_Bckgrnd.jpg

Blue_Textured_Bckgrnd.jpg

386 ms

42cddacb4afefffc2eac0796c97d2138.woff

42cddacb4afefffc2eac0796c97d2138.woff

324 ms

21d90222c523c6c3cdb750c72ea34b0a.woff

21d90222c523c6c3cdb750c72ea34b0a.woff

384 ms

events-v2.php

events-v2.php

393 ms

articles-v2.php

articles-v2.php

274 ms

articles-v2.php

articles-v2.php

264 ms

c5cd7f5300576ab4c88202b42f6ded62.gif

c5cd7f5300576ab4c88202b42f6ded62.gif

224 ms

resized-Admission-Home-6-lg.jpg

resized-Admission-Home-6-lg.jpg

227 ms

resized-Admission-2-lg.jpg

resized-Admission-2-lg.jpg

226 ms

resized-Admission-19-4-lg.jpg

resized-Admission-19-4-lg.jpg

267 ms

resized-TC-main-4-lg.jpg

resized-TC-main-4-lg.jpg

266 ms

students-in-faculty-office.jpg

students-in-faculty-office.jpg

265 ms

fee66e712a8a08eef5805a46892932ad.woff

fee66e712a8a08eef5805a46892932ad.woff

253 ms

896a02d1cec991d6c29721d9c9851f7f.woff

896a02d1cec991d6c29721d9c9851f7f.woff

245 ms

86626798fd8e2bd87e79cc753ee045aa.woff

86626798fd8e2bd87e79cc753ee045aa.woff

252 ms

8d171be274421df007dce4799c6c7c25.woff

8d171be274421df007dce4799c6c7c25.woff

280 ms

8a77dbb5bf41aef27270bc411fc6540e.woff

8a77dbb5bf41aef27270bc411fc6540e.woff

280 ms

b7c9e1e479de3b53f1e4e30ebac2403a.woff

b7c9e1e479de3b53f1e4e30ebac2403a.woff

279 ms

ping

ping

147 ms

js

js

183 ms

fbevents.js

fbevents.js

75 ms

insight.min.js

insight.min.js

172 ms

destination

destination

179 ms

analytics.js

analytics.js

47 ms

bat.js

bat.js

66 ms

collect

collect

102 ms

collect

collect

109 ms

26040428.js

26040428.js

75 ms

collect

collect

164 ms

collect

collect

168 ms

snowy-tc-way.jpg

snowy-tc-way.jpg

92 ms

26040428

26040428

86 ms

Khan-memorial-hero.jpg

Khan-memorial-hero.jpg

18 ms

bad-robot-ai-hero.jpg

bad-robot-ai-hero.jpg

20 ms

parents-rights-hero.jpg

parents-rights-hero.jpg

21 ms

resized-lg-image001.jpg

resized-lg-image001.jpg

22 ms

14-Riddhi-191112_hamerman_1264_lowres.jpg

14-Riddhi-191112_hamerman_1264_lowres.jpg

20 ms

claire-fagin-hero.jpg

claire-fagin-hero.jpg

18 ms

charles-moore-johnny-zhang-columbia.jpeg

charles-moore-johnny-zhang-columbia.jpeg

25 ms

insight_tag_errors.gif

insight_tag_errors.gif

113 ms

8780223ab6f659b1f3252c3789bc18b8.woff

8780223ab6f659b1f3252c3789bc18b8.woff

28 ms

b3d1e62a0e41189406eea3c8be7429f0.woff

b3d1e62a0e41189406eea3c8be7429f0.woff

29 ms

ga-audiences

ga-audiences

104 ms

ga-audiences

ga-audiences

103 ms

clarity.js

clarity.js

15 ms

articles-v2.php

articles-v2.php

60 ms

articles-v2.php

articles-v2.php

40 ms

c.gif

c.gif

24 ms

Accessibility Review

teacherscollege.edu accessibility score

93

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

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

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

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

Best Practices

teacherscollege.edu best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

teacherscollege.edu SEO score

86

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

robots.txt is not valid

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

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 Teacherscollege.edu 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 Teacherscollege.edu 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

teacherscollege.edu

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