He was, for 10 years, to no avail. He has been in a divorce situation / custody fight since he was 3 (that went on for almost a decade) and hasn't fully recovered from it.Given your son's history, is he in therapy?
I think getting expelled is his method of protesting the situation. I actually understand why he feels the way he does, even if it's a bit misguided.
I do think this will be different, now he specifically wants to attend this school for some reason. it's a military private school, most kids see it as a prison. But he loves it. Went there for the summer school and got all A's with exemplary behavior.