The Kenya Girl Guide Association (KGGA) and Family Health International (FHI)/Impact began a program, which was developed by PATH, in 1999 to train young Girl Guides as HIV peer educators in their schools. The project aims to improve knowledge and skills related to HIV prevention and care among Girl Guides and their peers. In collaboration with KGGA and FHI/Impact, the Horizons Program is currently conducting a study to evaluate the effectiveness of this intervention model in achieving the objectives of the peer education program. This research update presents baseline findings from the intervention study.