Very often both boys and girls can be taught by means of repetition. For instance, if you told the boy to repeat a hundred times, "I will not make pencil marks on the wall", after repeating it for a hundred times he will be impressed by it. There is a great difference in the effect of making a child repeat a phrase and making him write the phrase a hundred times. If you make the child write the phrase a hundred times the effect is one quarter compared with the effect if you had made him say it a hundred times; that is the best punishment you could give him. While he is repeating a hundred times he becomes impatient, he becomes tired and he is displeased with it; at the same time he is impressed that he is being punished. When one asks a child to stand for a long time and repeat, "I will not be mischievous", in fifteen minutes time it will take away a great deal of that spirit of mischievousness from it.