How to control anger?

This person in my class a school really pisses me off. It's not bullying, it seems as if he's jealous. Without being big headed, I always get A's and distinctions, he always talks **** about it. It's not my fault that I work hard and I couldn't care what anyone else in my class does or about their grades. Whenever I do make a small mistake, like everyone does, he will jump on it and make a mountain out of it. It's not a big problem and I do try and ignore it, but today I almost punched him in the face. It isn't like me but I really want to smack him, he makes me so angry.