The Go Girls! Toolkit contains a comprehensive set of research and program interventions designed to reduce girls' vulnerability to HIV. Field tested in Botswana, Malawi, and Mozambique, Go Girls! follows a socio-ecological approach to HIV prevention by working with communities, parents, schools, and youth to protect girls. This toolkit is for program managers, implementers, and researchers working in the areas of HIV, gender or youth programming, or a related field.