Exorcism I.O.

Exorcism I.O. is a project that was started a couple of years ago by a programmer named Katrina Owen and it's quickly grown to encompass tracks in, I think we have about 30 programming languages now. It's kind of unique compared to some other learn to code kind of projects. You can submit multiple iterations of the same thing and continue to get feedback as you improve your responses. There are also several channels on GitterChat that are very active both for support and for the developers.