School discipline refers to a system of rules, monitoring, sanctions, and rewards implemented by school personnel with the intent of shaping student behavior. Commonly associated with teachers and principals imposing order in classrooms and corridors by exerting control and maintaining student compliance through supervision and punishment, school discipline also plays a role in educational and moral development. There is general agreement that discipline in school is necessary. The extent and nature of that discipline, however, is variable and, at times, controversial.