Study must have, as has already been stated, a purpose. The individual, in order to exercise his mind in a controlled way, must have an aim. The clearer and more definite the aim, whether it be little or big, the better the study will be. From the beginning, then, children must be taught to make sure they know what they are going to do before beginning to study. It may be necessary to teach them in the early grades to say to themselves or to the class just what they are going to accomplish in the study. Teach them when the lesson is assigned to write down in their books just what the problem for study is. Warn them never to begin study without definitely knowing the aim--if they don't know it, make them realize that the first thing to do is to find out the purpose by asking some one else. Better no study at all than aimless or misdirected activity, because of lack of purpose. No study worthy of the name can be carried on without interest. The child who studies well must be brought to realize this. The value of interest can be brought home to him by having him compare the work he does, the time he spends, and how he feels when studying something in which he has a vital interest with the results when the topic is uninteresting. Of course, as will be pointed out later, much of the gaining of interest lies in the hands of the teacher necessarily, but if the child realizes the need of it in efficient study, some responsibility will rest on him to find an interest if it is not already there. No matter how expert the teacher may be, because of individual differences no problem will be equally interesting to all pupils in itself, and no incentive will have an equal appeal to all children. Therefore children should be taught to find interest for themselves. Certain devices can be suggested, such as working with another child and competing with him, "making believe" in study, and finding some connection with something in which he is interested, working against his own score, and the like.