I have a student that has ADHD and was such a behavior problem that he was moved into my class from another class. He's been suspended the maximum number of times he can be suspended so all they do is send him to the library to help the librarian. It gets to the point where he is yelling across the room at my other students and getting everyone riled up. I eventually have to send him out even though it's basically a vacation and I know he's doing it in purpose. The principal had chats with him but inevitably sends him right down the hall to the library. He has 8 siblings so I know he doesn't get enough attention at home so I've been trying instant rewards for things he does right but by the end of the day he just wants to go to the library so he'll do whatever he needs to to get sent out. His grades are low but he failed last year so the principal is just going to push him up at the end of this year. His mother is so hard to get ahold of. She doesnt have a phone so we have to send the school resource officer to hunt for her for a day. And then she does nothing after we talk with her. What can I do?