This project assesses the efficacy of an HIV prevention program with adolescent females incarcerated in the Mississippi training school for girls. Participants in both the health education control group and the HIV prevention group will increase health knowledge as a result of their participation in the health classes while incarcerated. However, participants in the HIV prevention group will increase their condom application, assertiveness, and communication skills relative to girls in the health education only group. In addition, after release from the training school, participants in the HIV prevention group will report lower sexual risk behaviors and will have lower rates of infection with chlamydia and gonorrhea during the 12-month follow-up period than participants in the health education only group.