This system can be used in 1st- 5th grade classrooms. The students are given a "credit card". This is a colored, laminated card that has their name on it and 100 spaces on it. When the students are behaving well, they get a punch (use a hole punch) on their credit card. They earn rewards after 10 punches or points have been earned up to 100 points. It is very competitive and you can make the rewards whatever works for your budget/needs. If students lose their credit card, they are given a new card and start over. I also usually make the new credit cards new colors just for fun.