This website is using a robots.txt file.

This website has a sitemap file.

Your webpage has 1 'img' tags and all of them contain the required 'alt' attribute.

Congratulations! Your page does not use HTML deprecated tags.

Congratulations! There are no severe JavaScript errors on your web page.

Congratulations! Your page is successfully compressed using gzip compression on your code.
Your HTML is compressed from 16.54 Kb to 6.26 Kb (62 % size savings). This helps ensure a faster loading web page and improved user experience.

Your site loading time is around 1.055 seconds and this is under the average loading speed which is 5 seconds.

Congratulations, your page has fewer than 20 http requests. A higher number of http requests results in a user's browser needing to request a large number of objects from your server, which will ultimately slow down the loading of your web page.

Your site is not using expires headers for your images. An expires tag can help speed up the serving of your webpages for users that regularly visit your site and see the same images. Learn more about how to add expires headers to your images.

Your URL performed one redirect! While redirects are typically not advisable (as they can affect search engine indexing issues and adversely affect site loading time), one redirect may be acceptable, particularly if the URL is redirecting from a non-www version to its www version, or vice-versa.

https://www.pbslearningmedia.org/asset/phy03_int_accel and https://pbslearningmedia.org/asset/phy03_int_accel resolve to the same URL.

Your website is successfully using https, a secure communication protocol over the Internet. Note: if your site relies primarily on ad income, be aware that using https may be detrimental to ad earnings.

Congratulations! Your webpage does not include email addresses in plaintext.

Your website is not using media queries. You should consider using this technique in order to implement responsive design functionalities.

Your webpage doesn't take the advantages of HTML Microdata specifications in order to markup structured data. View Google's guide for getting started with microdata.

Your webpage does not use the noindex meta tag. This means that your webpage will be read and indexed by search engines.

Your page does not use the canonical link tag.

Your webpage does not use the nofollow meta tag. This means that search engines will crawl all links from your webpage.

Your robots.txt file disallow the search engines access to some parts of your website. You are advised to check carefully if the access to these resources or pages must be blocked.

Your DNS server is not using an SPF record. SPF (Sender Policy Framework) allows administrators to specify which hosts are allowed to send mail from a given domain by creating a specific SPF record or TXT record in the Domain Name System (DNS). You can find more information about SPF records here.