Great Teacher Onizuka is about an ex-delinquent biker and ex-gang leader who dream to become the greatest teacher ever, using his own brand of philosophy and the ability to do nearly anything when under pressure.
He is hired as a long-shot teacher by a privately operated school to tame a class that has driven one teacher to a mysterious death, one to nervous breakdown, and one to joining a cult.
The class trouble makers include some of the smartest kids in Japan who prefer a more cerebral approach to torturing their teacher to... (I'll leave that to your imagination =)...