In this single-blind study, participants will include sixth grade students from 18 South African schools that meet study criteria. The participants will be randomly divided into 2 structurally similar treatment groups. One group will take part in HIV/STD risk-reduction sessions, while the other group will take part in health promotion sessions. There will be 12 total sessions, each lasting 1 hour. The participants in the HIV/STD risk-reduction group will be taught to practice abstinence and condom use through interactive activities, comic workbooks, and take-home assignments. Through similar methods, the participants in the health promotion group will be taught about general health problems, such as heart disease, diabetes, alcohol and drug abuse, and certain cancers. Participants will also be taught healthful behaviors to help prevent these health problems. All participants will provide self-reports of sexual behavior and precautionary methods used in sexual intercourse immediately before the first and after the last treatment sessions. Follow-up evaluations will occur at Months 3, 6, 12, 42, and 54 months post-treatment. STDs will be assessed 42 and 54 months post-treatment