In Tanzania, early childhood development (ECD) programmes are implemented in primary schools to improve child nutrition and cognitive skills. Qualitative data from interviews with teachers, parents, and focus group discussions were analysed for this study. A significant increase in child nutrition scores was noted across all participating schools, indicating improved dietary habits among children. Despite the positive impact on nutrition, cognitive skills growth varied significantly between villages, suggesting a need for tailored intervention strategies. Investment should be directed towards supporting teachers with additional training and resources to enhance cognitive development outcomes.