The purpose of the study is to study child differentiations in their relation to educational growth; to emphasize a greater need, on the part of today's teachers, for constant study of the atypical child in order to determine his developmental needs; to emphasize the importance and desirability of utilizing the talents of the highly endowed pupil; to consider current educational practices in their relation to the added capabilities of superior children; and to emphasize the importance of developing whatever desirable social qualities the mentally retarded child may possess.