_Individual Differences._ First, there is the problem of individual differences in the emotional life of students; and the teacher, too, for that matter. With some, the dominant emotion is fear and anxiety. The material of the present study shows a wide variation in the type and character of emotional reactions of the subjects studied in which anger is one of the most frequently occurring emotions. This difference is illustrated by the following summary from three subjects: With J., anger predominates over fear; he knows but little of the latter emotion. Anger usually occurs from a fore-period of lowered self-feeling, the feeling intensity of the fore-period is not strong. The reactive stage of the anger does not reach a high degree of excitement. With him, anger usually disappears into indifference and unpleasantness, leaving tendencies of passive dislike. He observed no cases of anger at injustice or unfairness except when the latter sentiments referred to himself. His anger for the most part is an unsuccessful experience and is unpleasant. He consequently tries to avoid getting angry and has relatively few emotions. The after-period of his anger tends to be a little morbid, lacking any strongly marked disposition which is the source of tendencies to do more work. Subject G. has anger as a dominant emotion over fear. He scarcely knows anger which arises from a fore-period of humiliation except anger at himself when he has been inefficient. He does not hold resentments against persons but against situations and principles. Anger is usually unpleasant except a mild after-period of relief. With him, anger is a means of throwing off superfluous feelings of irritation and serves but little the purpose of work, except to increase volitional action for the moment. His anger often refers to himself. Anger at unfairness tends to refer to the principle rather than to the person. The emotion occurs more frequently when he is unwell. It is rather slow to appear, by a gradual accumulation, till the point of anger is reached; the emotion does not attain a high degree of excitement. With subject C. the character and type of anger reaction is in marked contrast to the two subjects mentioned above. He knows but little of fear except in extreme situations. His anger nearly all springs from a fore-period of humiliation and is often intense in its most active stage. For a time during the most intense stage of the emotion, he almost loses the sense of justice; but as the emotion begins to die down, he has a habit of excusing the offender and looking at his side of the question. His anger is frequently followed by pity, remorse, shame and fear. The emotion is both pleasant and unpleasant. The disappearance is usually unpleasant and leaves a wealth of affective tendencies and mental attitudes which are later a source of both pleasant and unpleasant feelings. Anger is one of the greatest stimuli he has to do work.