This book was written for parents whose children are between 12 and 21 years of age. The author reviews the recent research on the period of adolescence that is especially valuable to parents in the guidance of their children. The social changes which are responsible for much of the adolescent's behavior are examined. These include the family pattern, which has changed from the patriarchal type of family to the democratic type prevalent today. The author considers that delayed marriage and the change in our educational systems also have caused many difficulties in the adjustment of adolescents. Earlier educational systems were characterized by a minimum amount of reading, writing and arithmetic, with trade training under skilled workers for those who intended to enter the various trades. Until recently, general education for all children, other than the three R's, was not heard of. Now our elementary school system seems to be designed primarily to train children to enter college, with little attempt at training them for life other than to provide a large collection of facts, all of which they lose more or less rapidly. In some of the following chapters the author discusses discipline, training and emotional control, growing up emotionally, character training, education for home and family life, and planning the day for the older child. With