Gender-based violence (GBV) prevention training programmes have been implemented in Zimbabwean urban slums to address the high prevalence of GBV among school teachers and students. The research employed a mixed-methods approach, including pre- and post-training surveys, interviews with participants, and observations in schools. Data was analysed using statistical software to identify trends and patterns. Retention rates among trained teachers were notably higher compared to untrained colleagues, with an increase of 30% observed over a year following training. Interviews revealed themes such as improved self-esteem and reduced stress levels among participants. The findings indicate that GBV prevention training programmes are effective in maintaining teacher retention and positively impacting their mental health, suggesting the need for sustainable support mechanisms to ensure long-term impact. Policy recommendations include integrating GBV education into school curricula, providing ongoing psychological support for teachers, and allocating resources for sustainability of such initiatives.