On the other hand, I'm not saying you're like this, but a lot of kids who are brilliant are incapable of working in groups, and that's pretty much what you have to do in real life.
Also, growing up, I would not allow that in my group there could be a slacker... report him / her, be a snitch, I didn't care, actually, what I did was help them so they can become better and do the homework.
But I didn't grow up in America where the smart kids just do the dumb kids homework because they're afraid of getting bullied, in fact, I learned about the concept up until I moved in here.