Every school has a set of rules and if students break these rules they are subject to discipline. For example, these rules may say that pupils (students) need to wear a school uniform, and what the school uniform must look like. They usually also say that school starts at a given time, and that pupils must be present at the school, at that time. If pupils do not follow the rules, they will be punished. The term "discipline" is applied to the punishment that is the consequence of breaking the rules. The aim of discipline is to set limits restricting certain behaviors or attitudes that are seen as harmful or against the school policies, educational norms, school traditions, etc. In the early days of schools, it was common to punish people if they did not follow the rules set by the school. In more recent times, other approaches have also been tried, such as rewarding good behavior. 