This book presents a high school curriculum that has clearly demonstrated success in postponing sexual intercourse. In this second edition, the curriculum has been expanded and updated to include human immunodeficiency virus (HIV) prevention. Two new class sessions emphasizing HIV prevention have been added, bringing the total number of class sessions to 16. This expanded curriculum also offers teachers an extensive background section on HIV and other sexually transmitted diseases. Information about birth control has been revised to reflect current research. Based on an educational model that combines cognitive and social skills training, this book involves students in role-play situations that simulate those they are likely to encounter outside the classroom. The class activities and homework assignment included in the book prepare students to effectively manage situations that might lead to risk-taking behavior. All lessons emphasize refusal statements, delay statements, and alternative actions students can use to abstain or protect themselves from pregnancy and HIV infection. Each class description includes a synopsis of activities and the approximate time required for each activity, material needed, detailed steps for leading each activity, student worksheets and handouts, role play scripts, teacher references and homework assignments. (NB)