Please check out my forum. I want to help students with their homework and I know I can't do it all alone. It's pretty plain but it allows adsense ad sharing. I also need people who like to help others post in the subject that they are interested in helping others with hw. The adsense option is unlocked after 50 posts and is shared at 50% and increases with more posts. The details in in the introduction section. Let me know what you think http://www.homeworkdiscussion.com If someone can create a live link post I'd appreciate it.
I actually do the same I help students with their coding homework but on my blog (got around1000 readers a day/average) instead of a forum although we do have a forum. Good luck with your site though!