Transescence is marked not only by disrupting acceleration in physical development and physiological change, but also by emotional and social pressures resulting from the transfer of authority from the family to the peer group. At no time in the schooling of our children do we find greater differences in the physical, social, emotional, and intellectual development of youngsters than we do during the middle years of ten to fourteen years of age. To give an understanding of the middle school student, this report looks closely at each one of the four areas of development. (Author)