Let the fun begin

Well, I just got a phone call. The munchkin was screaming in the background. He was yelling that he can do whatever he wants, and that he doesn't have to do anything he doesn't want to do. I am at my wits end. Every school he has been to has tried to have him removed. The last one actually succeed. This is our last shot - and he's only 7. He is so totally out of control. Everything is fine as long as he is doing what he wants. The minute he has to do something he doesn't like, or someone tells him no, the screaming and hitting starts. I can't even imagine what will happen next. I don't know where to turn or what to try. I have to pick him up from school in one hour. So not looking forward to that...