With well-behaved pupils there is never any need for teachers to use violence-a stern look or word is more than enough to bring them into line. And on the other hand, hitting a persistent troublemaker may work the first time, but the teacher subsequently has to resort to harder and harder punishment unless the underlying cause of the pupil's misbehavior can be determined.
對乖的學生，根本不須打他，只要用眼神、口頭指正，他就已經很害怕了；而真正調皮搗蛋的學生，打一次也許暫時有效，但如果老師不去了解他頑皮的原因，再犯時，難道不會越打越重嗎？