A multi-lesson summative assessment for MYP Mathematics in which students design a building for a refugee camp and apply geometry to a real humanitarian context. Students research a crisis country, then design a building in GeoGebra and apply the following mathematical content: surface area (prisms, cylinders, cones, composite solids), volume (and volume per person), nets of 3D solids, material cost estimation, and a guided energy and ventilation estimate using the heat transfer formula Q = U ×