A video covering the Fit for School Program Assessment Study, which was a collaborative effort between all partner organizations and a consortium of academic collaborators from local and international universities. The study was carried out in all 41 model schools and 41 corresponding control schools in Indonesia, Cambodia and Lao PDR. Research is an important tool for Fit for School to support program implementation, evidence-based advocacy and inform policies in education, health and WASH sectors. Conducting implementation research also boosts local research capacities, increases program ownership and facilitates south to south learning.