We noticed that a lot of our buttons and icons have gone missing making it very difficult / impossible to navigate through some parts of the site like the Drills and the Lessons pages. We're tracking down the issue right now and hoping to get it fixed asap.

Sorry about this! I'll update as soon as I have more information!

Update

We've found a fallback solution, and we're deploying it now. We estimate that the fix will be live in about five minutes. The site will still have a variety of visual oddities, but it will be functional.

The issue was caused by an outage from our icon provider, and it won't be resolved completely until they fix things on their end.

Thank you for patience!

Update 2

Solution is deployed! Drills, PTs and the Curriculum should be functional now (though they may still look a bit funky). Let us know if you are still experiencing issues.