Homework Crowd Sourcing

Okay, I'm sure that one could use Facebook for this in some way, but I think there should be a specific site that allows kids who are working on projects to work on them with other kids, in real time. Not that the kids should cheat from each other, but that they should learn from each other. Kids should always be able to explain how they got from x to y idea, and that would be one bit of required proof of their understanding. Truth is, sometimes the kids are grouped on projects with other kids that can't help them or refuse to do the work. They should be able to log onto the homework site and go to a category and see who's in the "study hall" on that topic, then share ideas with them. It's like real life, and it's a skill they will definitely use the moment they are out of school. Many of them already do this haphazardly, might as well make it understood and accepted.