This reader provides teachers with background material on a range of sex-related subjects likely to surface in any classroom at every level, but particulary in middle or high school science classrooms. The first section presents statements of the National Science Teachers Association supporting the right and responsibility of teachers to provide sex education. The second section provides articles which focus on the debate between advocates of sex education and its opponents as well as on the past and future role of sex education in schools. The third section develops the concept that an adequate sex education program can help students to clarify their values and to recognize personally as well as socially acceptable moral and ethical principles. At the same time, this section is designed to present practical examples of both content and technique to assist in the sensitive teaching task that sex education presents. Each article in this section stresses that adequate sex education consists of more than strictly biological information. The fourth section reinforces the need for teaching specific topics which sometimes are eliminated by censorship. Articles in this section focus on such topics as venereal disease, birth control, premarital sex, abortion, and homosexuality. (JN)