Alternate title: You Khan't Divide a Vector by a Vector ... for Excellence in Science and Math Teaching). Frank has a whole bunch of posts about Khan Academy. This is required reading.

Another use case that you could say maybe the pandemic catalyzed is I’ve always been interested in how work on Khan Academy can translate into real credit. I’ll just pick college algebra ...

The first, founded by Bill Gates's "favorite teacher", the Khan Academy website breaks down calculus and linear algebra in ways that are just so simple and intuitive. The thing that Khan Academy ...