The Good Behavior Game

For the teachers out there:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1310853/pdf/jaba00065-0063.pdf

This is a research article describing the "Good Behavior Game".  Basically you divide your classroom into teams.  Set specific rules and when any rule is broken by a single student their group recieves a point.  The group with the least points at the end of the day gets a reward.  If multiple groups have the same number of points then both groups get the reward.  It sounds very interesting!  The rewards can be pretty simple:  going to recess a little earlier than the other group, a special project, class helpers, etc.