Our class rule is: "Do not do anything that hurts or bothers yourself or someone else." I usually give a gentle reminder for the first infraction of the rule. If the student continues I ask him/her to change their color from green to red. At the end of the day, all of the greens get a small reward. If a student continues to break the rule, they will be given a problem solving paper to fill out and take home for a parent’s signature.