Well, he definitely needs to learn some discipline, but I'm just wondering if there might be some issue, a learning disability or something similar, that no one has spotted. Sometimes smart kids fight schoolwork because something is interfering and making it too hard for them to cope.

What was the Teen like in elementary school? I know by about seventh grade he was having trouble, but what was he like in first, second, third?

And has he had his eyes and hearing checked recently? It might be worth trotting him to see the eye doctor and his family doctor.