Yes!  I noticed the same thing in 6th grade math and in programming.

https://support.khanacademy.org/hc/en-us/community/posts/36006834918541-Did-the-Khan-Academy-web-site-get-updated-today-Weird-fonts

Hi arssonya,

Thanks for reporting this!

There are currently some issues with fonts and styling on several parts of the site. The team is aware of this issue and is currently working on it.

Oh great, thanks for clarifying!

It looks like the issue has been fixed.

I made a post asking that it be easier for users to know about significant issues on the KA website.  Please add your thoughts, arssonya!

https://support.khanacademy.org/hc/en-us/community/posts/36091657838605-Please-make-a-permanent-link-on-the-KA-website-to-the-status-page-and-update-it-for-every-outage