Discipline can be both an instruction and a measurement of children's behavior. Teachers are in charge of the classroom and model appropriate behavior. Children, in schools, are given opportunities to explore and understand the world and themselves. Discipline is about internal control and not just external control. Classrooms have rules that children must follow.
Schools have recesses, school holidays, and summer breaks.
Discipline is about doing nothing as much as it is about doing something. While this may not cover all aspects of school routines or discipline practices, it does ask some very reflective questions. It is possible we missed the most basic reason for children's different behaviors, namely, novel situations and conditional love. Novel situations refer to a phenomenon that affects a child's behavior, for good, when in a new environment. A new environment is unpredictable and may require a child to be on his or her best behavior until the child learns what the rules and consequences are or what they can get away with.