American History X
During one of his routine stops at a local school, where he barks at children and tears up the playground with his dogs, DMX finds himself in a moment of clarity when he peers into a window and sees a history class in progress. He asks the teacher if he can join, and she calls the police on him. X barks and runs away.
For the next six months, X reads every history book he can get his hands on. Now he's back in that same classroom—but this time, he's the teacher.