I implement a Fishy Friday incentive system in my classroom. Students earn blue fish cards throughout the week for good behavior and work habits. They can also get them taken away for thing such as forgetting to turn in their homework, using the bathroom, etc. You can use this poster to help younger students know what color fish cards to give you when then need to use the bathroom, get a pencil, etc. I only use generally blue but each student gets a purple, pink, and yellow fish at the beginning of each week. This system works great with younger students!