Leonard Sax is an American psychologist and family doctor who has spent many years studying the relevance of sex difference in the education of boys and girls. In this books he points out how both boys and girls are disadvantaged if their teachers fail to bear in mind the great differences between males and females. A simple example of this is that boys in general require a significantly louder voice from a teacher than girls. Female teachers tend not to realise this and may attribute inattention by boys in class to attention deficit disorder whereas it may simply be a question of audibility. The clear implication is that single-sex schooling benefits boys and girls greatly. He also discusses homosexual tendencies and gender disorders among boys and girls, their genesis, and how they may be treated. He highlights the importance of the role of male models in the upbringing of boys. His moral assessment of homosexual behaviour is perhaps a bit ambiguous, but for the most part his discussion of these matters appears to be both scholarly and common-sensical. This book (the second edition rather than the first edition) would be of great use to parents, and indeed anyone involved in the education or formation of boys or girls.