Tools & Wizards About Us
teacherscollege.columbia.edu screenshot

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

teacherscollege.columbia.edu

Graduate School of Education | Teachers College, Columbia University

Page Load Speed

2.3 sec in total

First Response

107 ms

Resources Loaded

942 ms

Page Rendered

1.3 sec

teacherscollege.columbia.edu screenshot

About Website

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

Key Findings

We analyzed Teacherscollege.columbia.edu page load time and found that the first response time was 107 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

teacherscollege.columbia.edu performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

51/100

10%

LCP (Largest Contentful Paint)

Value11.4 s

0/100

25%

SI (Speed Index)

Value6.8 s

34/100

10%

TBT (Total Blocking Time)

Value1,020 ms

26/100

30%

CLS (Cumulative Layout Shift)

Value0.66

8/100

15%

TTI (Time to Interactive)

Value16.9 s

5/100

10%

Network Requests Diagram

teacherscollege.columbia.edu

107 ms

www.tc.columbia.edu

64 ms

gtm.js

333 ms

ping

466 ms

styles.css

31 ms

Our browser made a total of 57 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Teacherscollege.columbia.edu, 82% (47 requests) were made to Tc.columbia.edu and 7% (4 requests) were made to Curator-assets.b-cdn.net. The less responsive or slowest element that took the longest time to load (466 ms) relates to the external source Apply.tc.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 411.8 kB (5%)

Content Size

8.3 MB

After Optimization

7.9 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Teacherscollege.columbia.edu main page is 8.3 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 7.9 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 121.9 kB

  • Original 143.6 kB
  • After minification 131.0 kB
  • After compression 21.8 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 121.9 kB or 85% of the original size.

Image Optimization

-4%

Potential reduce by 289.7 kB

  • Original 7.9 MB
  • After minification 7.6 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 Columbia images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 24 B

  • Original 192.5 kB
  • After minification 192.5 kB
  • After compression 192.5 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 179 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. Teacherscollege.columbia.edu has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 3 (7%)

Requests Now

46

After Optimization

43

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Teachers College Columbia. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

teacherscollege.columbia.edu

teacherscollege.columbia.edu

107 ms

www.tc.columbia.edu

www.tc.columbia.edu

64 ms

gtm.js

gtm.js

333 ms

ping

ping

466 ms

styles.css

styles.css

31 ms

bundle.js

bundle.js

67 ms

2.6.14.min.js

2.6.14.min.js

66 ms

Primary-Logo_Left-Aligned_White@2x.png

Primary-Logo_Left-Aligned_White@2x.png

400 ms

Milman-hero.jpg

Milman-hero.jpg

431 ms

ruth-bw.jpg

ruth-bw.jpg

428 ms

iStock-1382498148.jpg

iStock-1382498148.jpg

433 ms

Summer-events-recap-hero.jpg

Summer-events-recap-hero.jpg

431 ms

Faculty-Awards-2024-hero-.jpg

Faculty-Awards-2024-hero-.jpg

432 ms

tc_number_1_png_820x280.png

tc_number_1_png_820x280.png

431 ms

Public_Good_Iniative_Logo.png

Public_Good_Iniative_Logo.png

443 ms

Diversity_At_TC_Image_1200x800.jpg

Diversity_At_TC_Image_1200x800.jpg

445 ms

Extended_Neighborhood_Image_1200x800.jpg

Extended_Neighborhood_Image_1200x800.jpg

449 ms

Visit_Campus_Image_1200x800.jpg

Visit_Campus_Image_1200x800.jpg

439 ms

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

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

437 ms

social-feed-v2.php

social-feed-v2.php

364 ms

Education_Image_1200x800.jpg

Education_Image_1200x800.jpg

317 ms

Health_Image_1200x800.jpg

Health_Image_1200x800.jpg

310 ms

Psychology_Image_1200x800.jpg

Psychology_Image_1200x800.jpg

315 ms

View_All_Image_1200x800.jpg

View_All_Image_1200x800.jpg

341 ms

Public_Good_Site_Image_lg.jpeg

Public_Good_Site_Image_lg.jpeg

317 ms

New_Brand_Site_Hero_final.jpg

New_Brand_Site_Hero_final.jpg

373 ms

blue-bokeh.jpeg

blue-bokeh.jpeg

374 ms

Blue_Textured_Bckgrnd.jpg

Blue_Textured_Bckgrnd.jpg

376 ms

42cddacb4afefffc2eac0796c97d2138.woff

42cddacb4afefffc2eac0796c97d2138.woff

374 ms

21d90222c523c6c3cdb750c72ea34b0a.woff

21d90222c523c6c3cdb750c72ea34b0a.woff

376 ms

articles-v2.php

articles-v2.php

233 ms

articles-v2.php

articles-v2.php

226 ms

c5cd7f5300576ab4c88202b42f6ded62.gif

c5cd7f5300576ab4c88202b42f6ded62.gif

132 ms

resized-Admission-Home-6-lg.jpg

resized-Admission-Home-6-lg.jpg

134 ms

resized-Admission-2-lg.jpg

resized-Admission-2-lg.jpg

133 ms

resized-Admission-19-4-lg.jpg

resized-Admission-19-4-lg.jpg

133 ms

resized-TC-main-4-lg.jpg

resized-TC-main-4-lg.jpg

134 ms

students-in-faculty-office.jpg

students-in-faculty-office.jpg

135 ms

fee66e712a8a08eef5805a46892932ad.woff

fee66e712a8a08eef5805a46892932ad.woff

122 ms

896a02d1cec991d6c29721d9c9851f7f.woff

896a02d1cec991d6c29721d9c9851f7f.woff

122 ms

86626798fd8e2bd87e79cc753ee045aa.woff

86626798fd8e2bd87e79cc753ee045aa.woff

123 ms

8d171be274421df007dce4799c6c7c25.woff

8d171be274421df007dce4799c6c7c25.woff

123 ms

8a77dbb5bf41aef27270bc411fc6540e.woff

8a77dbb5bf41aef27270bc411fc6540e.woff

123 ms

9873c345f4c858ddea36836c5b23b981.woff

9873c345f4c858ddea36836c5b23b981.woff

124 ms

b7c9e1e479de3b53f1e4e30ebac2403a.woff

b7c9e1e479de3b53f1e4e30ebac2403a.woff

124 ms

353618634.jpg

353618634.jpg

205 ms

353524276.jpg

353524276.jpg

157 ms

353474594.jpg

353474594.jpg

177 ms

353375374.jpg

353375374.jpg

192 ms

TXZ_-composite.jpg

TXZ_-composite.jpg

14 ms

Spring-2024-Faculty-Round-Up-hero.jpg

Spring-2024-Faculty-Round-Up-hero.jpg

13 ms

STEAM-hero.jpg

STEAM-hero.jpg

12 ms

gds_luncheon_24_gilbert_220.JPG

gds_luncheon_24_gilbert_220.JPG

14 ms

LGBTQ-Books.jpg

LGBTQ-Books.jpg

9 ms

Juneteenth-2024-hero.jpg

Juneteenth-2024-hero.jpg

14 ms

Will_Trevor_Hero_1200x800_1.jpg

Will_Trevor_Hero_1200x800_1.jpg

15 ms

IMG_1094_lg.jpeg

IMG_1094_lg.jpeg

18 ms

Accessibility Review

teacherscollege.columbia.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.columbia.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.columbia.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 Teacherscollege.columbia.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.columbia.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.columbia.edu

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