https://github.com/enkidevs/...
https://github.com/sagelabs/...

A repository says more then a thosand words.

Saw them announcing it, I just personally don't really see any value in releasing it (besides just looking at quick things like "how did they do this in react" - maybe their blog mentions it, didn't read that just yet) - since all the value is in the learning material, they don't offer any new technologies or anything, its really just a quiz app that emails you