My undergraduate degree is in Music Education. When I was student teaching my discipline for the class was setup on a rewards system (I was k5-5th grade). The class had "m-u-s-i-c" written on the board and would lose a letter if I needed to discipline for a particular reason. The reward was a star at the end of class and 1 point for each letter that remained on the board, with a bonus 5 points if no letters were removed. Basically it served as a competition. I told them that the class from each age group with the most points at the end of the month would get a special prize.