572 ms in total
88 ms
323 ms
161 ms
Click here to check amazing Teachers First content. Otherwise, check out these important facts you probably never knew about teachersfirst.us
TeachersFirst is Thinking Teachers, Teaching Thinkers. TeachersFirst offers a rich collection of lessons, units, and educator-reviewed web resources designed to save teachers time by delivering just w...
Visit teachersfirst.usWe analyzed Teachersfirst.us page load time and found that the first response time was 88 ms and then it took 484 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.
teachersfirst.us performance score
name
value
score
weighting
Value2.5 s
67/100
10%
Value6.0 s
13/100
25%
Value4.5 s
72/100
10%
Value4,550 ms
0/100
30%
Value0.025
100/100
15%
Value9.4 s
30/100
10%
88 ms
14 ms
11 ms
36 ms
33 ms
Our browser made a total of 25 requests to load all elements on the main page. We found that 76% of them (19 requests) were addressed to the original Teachersfirst.us, 8% (2 requests) were made to Stats.g.doubleclick.net and 4% (1 request) were made to Assets.adobedtm.com. The less responsive or slowest element that took the longest time to load (139 ms) relates to the external source Cdn.syndication.twimg.com.
Page size can be reduced by 548.7 kB (61%)
901.2 kB
352.5 kB
In fact, the total size of Teachersfirst.us main page is 901.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Javascripts take 667.7 kB which makes up the majority of the site volume.
Potential reduce by 30.0 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. This page needs HTML code to be minified as it can gain 7.6 kB, which is 20% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 30.0 kB or 78% of the original size.
Potential reduce by 4.8 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. Teachers First images are well optimized though.
Potential reduce by 463.2 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 463.2 kB or 69% of the original size.
Potential reduce by 50.6 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. Teachersfirst.us needs all CSS files to be minified and compressed as it can save up to 50.6 kB or 80% of the original size.
Number of requests can be reduced by 12 (50%)
24
12
The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Teachers First. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
teachersfirst.us
88 ms
satelliteLib-105585cc7e1c04abf8c5af840e6023811b2f0cc2.js
14 ms
style.css
11 ms
tf3emin.css
36 ms
foundation-icons.css
33 ms
modernizr-1.6.min.js
31 ms
addthis_widget.js
7 ms
jquery.js
9 ms
anythingslider.css
28 ms
jquery.anythingslider.js
29 ms
twitterFetcher.js
95 ms
plugins.js
97 ms
script.js
98 ms
tf_logo_stroke.png
45 ms
blank.gif
45 ms
_57162199.png
48 ms
star_large.png
46 ms
icon_sprite_xlarge.png
45 ms
icon_sprite_small.png
44 ms
new_window_icon.gif
46 ms
347441259171954689
139 ms
dc.js
58 ms
poll.php
17 ms
tfprint.css
19 ms
__utm.gif
10 ms
teachersfirst.us accessibility score
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
Buttons do not have an accessible name
Image elements do not have [alt] attributes
Form elements do not have associated labels
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
[id] attributes on active, focusable elements are not unique
Heading elements are not in a sequentially-descending order
teachersfirst.us best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
teachersfirst.us SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
Document uses legible font sizes
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Teachersfirst.us 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 Teachersfirst.us 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.
teachersfirst.us
Open Graph description is not detected on the main page of Teachers First. 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: