The project targets a crucial bottleneck in the Sahelian education sector: the transfer of children, especially girls, from primary to secondary school. Five million school-aged children are out of school in Mali, Burkina Faso and Niger. Every year, more than 400,000 more drop out, with slim chances of reenrolling. The project aims to refine a low-cost mechanism for reinserting primary school drop-outs into lower secondary. Education is a goal in itself, and for the highly vulnerable group of 13-14-year-old children, schooling may also prevent negative outcomes such as early child bearing, trafficking and radicalization. Delaying the age of first pregnancy is important to several health outcomes, and also targets one of the greatest challenges to economic development in the region: the high population growth. The Speed School II mechanism, suggested in this proposal, builds on the highly successful Speed School I model, currently being scaled up in the region. Yet, it acknowledges the different challenges of working with an older child population. The project will document the results of a 2-year intervention mechanism in a Randomized Controlled Trial (RCT), covering 30 treatment and 30 control communities. Alongside schooling, the research component will document variation in the prevalence of negative child outcomes. The research adds to the RCT literature by researching a treatment that offers schooling without financial incentives. In existing studies, the impact of transfers is easily confounded with the impact of schooling itself. This has political implications: in very poor economies, transfer programs can be unaffordable, especially when the target group is large. Finally, the tailoring of a successful catch-up mechanism for older out-of-school children is widely applicable also beyond the Sahelian region. Notably, conflict and post-conflict areas around the world face huge out-of-school populations with an urgent need to be reinserted into school.