Schools provide an important entry point for preventing violence not only in schools, but also in the wider communities they serve. School-based interventions provide an important opportunity to prevent violence at scale, given their potential to reach many students, teachers and parents. Schools have considerable influence on children’s learning about respectful relationships with their peers, potential partners and in the wider community. With carefully designed and implemented interventions, schools can transform harmful attitudes and norms towards violence. This query is based on a mapping of successful programmes which have been employed in primary and secondary schools and have proven to be successful in tackling school-based violence and changing attitudes and norms towards violence.