Educational type of application

mods: if this is in the wrong category or what not please feel free to
delete or move.

I’ve been looking for something like moodle but in RoR that would give
the ability to create tests, quizes, and other academic type of
activities but my googling is just not panning out.
I have found fedena and rubycampus (school administration) but … I
would rather have something that teachers could use to help kids study
Sure I could go with moodle and then add in extensions and what not but
I want to take this chance of doing something in RoR so that I get
something out of this project (I’m doing this for free for a non-profit,
volunteer site).
Does anybody have an idea or could refer me to an app that already does