It is frequently desirable that the same subject be assigned to all pupils, so that the results may be compared and presented to the class as part of the regular instruction. At other times it is necessary to give the class a number of subjects from which each pupil may select the one that suits him best; and at still others, to suggest general topics from which the pupil may frame his own subject. In announcing and assigning a subject for compositions the teacher can be of much assistance to the pupils by discussing with the class the subject under consideration. These discussions will stimulate interest in the subject, and will arouse a desire on the part of the pupils to write upon it. The teacher can direct the discussion so that the pupils will be led to consider the best method of treating the subject and can thus prevent waste of effort. It is necessary, however, to guard against giving the pupil so many suggestions that little original thought and observation will be required in writing the theme. That clear, logical thinking is prerequisite for clear expression should also be constantly emphasized in teaching composition. Pupils must be made to realize, as has already been said, that unless thoughts are clear in their own minds, they cannot expect to make these thoughts clear to others. They should be taught, therefore, to get before their minds clearly what they desire to express before they undertake to express it. The first step can be taken early in the course when the pupils are writing narratives, by urging upon them the necessity of accuracy in observing what happens and how it happens, since the degree of completeness of the remembrance of the event depends upon the character of the impression. In description, likewise, careful observation of what is to be portrayed must be emphasized as the only means of obtaining a complete mental picture that can be described to others. The methods of exposition and argumentation presented in the third and fourth years naturally involve a discussion of the methods of reasoning and as much logic as the pupils can comprehend. So closely related are thinking and the expression of thought that, as has been pointed out before, much of the work of teaching pupils to express their thoughts clearly and accurately is really concerned with teaching them to think clearly and logically.