Classroom management and management of student conduct are skills that teachers acquire and hone over time. Skills such as effective classroom management are central to teaching and require \"common sense,\" consistency, an often undervalued teacher behavior, a sense of fairness, and courage. These skills also require that teachers understand in more than one way the psychological and developmental levels of their students. The skills associated with effective classroom management are only acquired with practice, feedback, and a willingness to learn from mistakes.