I use this system in my classroom, and we call it "Monkey Monkey" because our classroom theme is monkeys. My students love getting paid, and they remind me if I forget :) I use this system to reward my students for good and bad behavior. They receive money for their positive actions and must pay the teacher for poor behavior. At the end of every week, the students show me their balance sheet and get to "pay" for a prize out of the prize box. I use this with my fifth graders, but it can be adjusted for other grade levels. Please feel free to personalize the system to fit the needs of your individual classroom.