This Factsheet presents the Fit for School Approach and how it started in the Philippines and expanded into 3 neighboring countries: Indonesia, Cambodia, and Lao PDR - through the development of replicable implementation models and guidelines. As the models have been integrated into the national Water, Sanitation, and Hygiene (WASH) program in Schools (WinS), GIZ now supports government-led scale-up in the respective partner countries.