Tools & Wizards About Us
tc.edu screenshot

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 77% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 93

    SEO

    Google-friendlier than
    84% of websites

tc.edu

Graduate School of Education | Teachers College, Columbia University

Page Load Speed

2.8 sec in total

First Response

95 ms

Resources Loaded

1.4 sec

Page Rendered

1.3 sec

tc.edu screenshot

About Website

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

Key Findings

We analyzed Tc.edu page load time and found that the first response time was 95 ms and then it took 2.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

tc.edu performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

50/100

10%

LCP (Largest Contentful Paint)

Value11.7 s

0/100

25%

SI (Speed Index)

Value6.1 s

45/100

10%

TBT (Total Blocking Time)

Value1,170 ms

21/100

30%

CLS (Cumulative Layout Shift)

Value0.659

8/100

15%

TTI (Time to Interactive)

Value14.7 s

8/100

10%

Network Requests Diagram

tc.edu

95 ms

www.tc.columbia.edu

41 ms

gtm.js

190 ms

ping

490 ms

styles.css

34 ms

Our browser made a total of 76 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Tc.edu, 62% (47 requests) were made to Tc.columbia.edu and 7% (5 requests) were made to T4.tc.columbia.edu. The less responsive or slowest element that took the longest time to load (572 ms) relates to the external source Tc.columbia.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 315.4 kB (4%)

Content Size

7.0 MB

After Optimization

6.7 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Tc.edu main page is 7.0 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 6.5 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 131.4 kB

  • Original 155.0 kB
  • After minification 141.6 kB
  • After compression 23.6 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 131.4 kB or 85% of the original size.

Image Optimization

-3%

Potential reduce by 183.4 kB

  • Original 6.5 MB
  • After minification 6.4 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. Tc images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 418 B

  • Original 228.5 kB
  • After minification 228.5 kB
  • After compression 228.1 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 176 B

  • Original 83.5 kB
  • After minification 83.5 kB
  • After compression 83.3 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. Tc.edu has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 12 (18%)

Requests Now

65

After Optimization

53

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 65 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tc. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

tc.edu

tc.edu

95 ms

www.tc.columbia.edu

www.tc.columbia.edu

41 ms

gtm.js

gtm.js

190 ms

ping

ping

490 ms

styles.css

styles.css

34 ms

bundle.js

bundle.js

74 ms

2.6.14.min.js

2.6.14.min.js

72 ms

Primary-Logo_Left-Aligned_White@2x.png

Primary-Logo_Left-Aligned_White@2x.png

333 ms

All-Grads.jpg

All-Grads.jpg

335 ms

3-Teachers-Making-A-Difference-.jpg

3-Teachers-Making-A-Difference-.jpg

334 ms

reading-2.jpg

reading-2.jpg

418 ms

iStock-1265582169-modified-0d5254d6-b987-4fa1-aa17-d181a954b53d.jpg

iStock-1265582169-modified-0d5254d6-b987-4fa1-aa17-d181a954b53d.jpg

400 ms

Apply-fall2024.jpg

Apply-fall2024.jpg

402 ms

tc_number_1_png_820x280.png

tc_number_1_png_820x280.png

335 ms

Public_Good_Iniative_Logo.png

Public_Good_Iniative_Logo.png

401 ms

Diversity_At_TC_Image_1200x800.jpg

Diversity_At_TC_Image_1200x800.jpg

403 ms

Extended_Neighborhood_Image_1200x800.jpg

Extended_Neighborhood_Image_1200x800.jpg

418 ms

Visit_Campus_Image_1200x800.jpg

Visit_Campus_Image_1200x800.jpg

462 ms

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

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

416 ms

social-feed-v2.php

social-feed-v2.php

360 ms

Education_Image_1200x800.jpg

Education_Image_1200x800.jpg

327 ms

Health_Image_1200x800.jpg

Health_Image_1200x800.jpg

326 ms

Psychology_Image_1200x800.jpg

Psychology_Image_1200x800.jpg

377 ms

View_All_Image_1200x800.jpg

View_All_Image_1200x800.jpg

376 ms

Public_Good_Site_Image_lg.jpeg

Public_Good_Site_Image_lg.jpeg

377 ms

New_Brand_Site_Hero_final.jpg

New_Brand_Site_Hero_final.jpg

572 ms

blue-bokeh.jpeg

blue-bokeh.jpeg

387 ms

Blue_Textured_Bckgrnd.jpg

Blue_Textured_Bckgrnd.jpg

572 ms

42cddacb4afefffc2eac0796c97d2138.woff

42cddacb4afefffc2eac0796c97d2138.woff

531 ms

21d90222c523c6c3cdb750c72ea34b0a.woff

21d90222c523c6c3cdb750c72ea34b0a.woff

569 ms

events-v2.php

events-v2.php

359 ms

articles-v2.php

articles-v2.php

362 ms

articles-v2.php

articles-v2.php

208 ms

c5cd7f5300576ab4c88202b42f6ded62.gif

c5cd7f5300576ab4c88202b42f6ded62.gif

311 ms

resized-Admission-Home-6-lg.jpg

resized-Admission-Home-6-lg.jpg

356 ms

resized-Admission-2-lg.jpg

resized-Admission-2-lg.jpg

359 ms

resized-Admission-19-4-lg.jpg

resized-Admission-19-4-lg.jpg

356 ms

resized-TC-main-4-lg.jpg

resized-TC-main-4-lg.jpg

359 ms

students-in-faculty-office.jpg

students-in-faculty-office.jpg

358 ms

js

js

130 ms

fbevents.js

fbevents.js

220 ms

insight.min.js

insight.min.js

297 ms

destination

destination

254 ms

analytics.js

analytics.js

291 ms

bat.js

bat.js

249 ms

fee66e712a8a08eef5805a46892932ad.woff

fee66e712a8a08eef5805a46892932ad.woff

282 ms

896a02d1cec991d6c29721d9c9851f7f.woff

896a02d1cec991d6c29721d9c9851f7f.woff

281 ms

86626798fd8e2bd87e79cc753ee045aa.woff

86626798fd8e2bd87e79cc753ee045aa.woff

283 ms

8d171be274421df007dce4799c6c7c25.woff

8d171be274421df007dce4799c6c7c25.woff

285 ms

8a77dbb5bf41aef27270bc411fc6540e.woff

8a77dbb5bf41aef27270bc411fc6540e.woff

286 ms

9873c345f4c858ddea36836c5b23b981.woff

9873c345f4c858ddea36836c5b23b981.woff

283 ms

b7c9e1e479de3b53f1e4e30ebac2403a.woff

b7c9e1e479de3b53f1e4e30ebac2403a.woff

283 ms

349889320.jpg

349889320.jpg

435 ms

349778080.jpg

349778080.jpg

456 ms

349682426.jpg

349682426.jpg

489 ms

349473622.jpg

349473622.jpg

499 ms

Psych-Grads-1.jpg

Psych-Grads-1.jpg

147 ms

26040428.js

26040428.js

57 ms

collect

collect

27 ms

collect

collect

23 ms

Health-Grads-2024.jpg

Health-Grads-2024.jpg

16 ms

Education-Grads.jpg

Education-Grads.jpg

17 ms

resized-melting-world-hero.jpg

resized-melting-world-hero.jpg

17 ms

gordon-50th-anniversary-hero.jpeg

gordon-50th-anniversary-hero.jpeg

26 ms

TCNC-hero.jpg

TCNC-hero.jpg

29 ms

Caroline_Ebanks_1200x800_v1.jpg

Caroline_Ebanks_1200x800_v1.jpg

19 ms

parkinsons-disease-collabs-hero.JPG

parkinsons-disease-collabs-hero.JPG

29 ms

insight_tag_errors.gif

insight_tag_errors.gif

87 ms

collect

collect

33 ms

collect

collect

43 ms

26040428

26040428

53 ms

ga-audiences

ga-audiences

78 ms

ga-audiences

ga-audiences

72 ms

clarity.js

clarity.js

9 ms

articles-v2.php

articles-v2.php

43 ms

c.gif

c.gif

7 ms

Accessibility Review

tc.edu accessibility score

91

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-hidden="true"] elements contain focusable descendents

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

tc.edu best practices score

92

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

Missing source maps for large first-party JavaScript

SEO Factors

tc.edu SEO score

93

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

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 Tc.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 Tc.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

tc.edu

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