What is this movie called?

Its about a kid who goes to an all-male private school. He is a troublemaker. His teacher helps him mature and become a good student. He takes a test to qualify for a competition, and his teacher boosts up his grade so he can compete.

In the competition, he is being asked questions, but has "cheat sheets" under his sleeve to help him. they found out he cheated.

Years later the class has a reunion and they hold the competition again. This time he cheats again, using an earpiece for answers.

I dont remember much else from the movie, but if anyone knows please help me out.