I am an art teacher. My classes earn a crayon for good behavior each day. They work towards 5-10 crayons and when they earn them they can vote for a class celebration. (i.e. Sidewalk Chalk Day, Art Video, Free Draw Day, Picture Book Art Day, or Color Explosion)
10 Ways to Sabotage Your Classroom Managment: If you are having classroom management problems, take a look at this article, which explains what NOT to do, and the more effective practices you should try instead.