Maintaining HIV Prevention Gains in Female Adolescents

In this study, an intervention is tested that is designed to reduced risky sexual behaviors in adolescent females. Study design: * randomized, controlled study * participants: 640 girls aged 15-19 years old * length of follow-up: 1 year after the intervention is completed Study hypothesis: The experimental condition will significantly reduce risky sexual behaviors in adolescent females as measured by: * lower incidence of STI's at 6 and 12 months, as compared to baseline * decreased incidence of risky sexual behaviors * increased knowledge of the level of risk of certain behaviors * increased knowledge of safer sexual behaviors that can prevention HIV infection * increased motivation to reduce sexual risk * increased behavioral skills to reduce risk of HIV infection