Haha wow I love that idea. The first thing that comes up is that back in the day, I was taught git concepts and commands by a few different people, but it wouldn't "stick". But then I met this one engineer, and his teaching approach worked _super_ well for me.
So I like the idea that a bunch of different people could teach the same material, and you could be the platform to help people discover it.
Off the top of my head, here are some things I'd love help with (sorry if it's too specific haha):
- imagemagick CLI concepts
- Better understanding bash
- Better understanding different types of joins in sql (15 years later, I still can't grock that)