The rehabilitation project for the existing school responds to the constraints imposed by the Israeli authorities: the building had to keep the external layer of iron sheet and could not grow any single squared meter. There have been two main design themes: Natural ventilation and isolation of the building. The existing roof has been substituted by sandwich panels, raised and inclined, generating new opening strips from different heights which allow the natural ventilation.The exterior walls have been modified with the technique of “pisè”, becoming a multi-layer wall 34 cm. thick, including an interior lime plastering, bamboo layer, straw and clay mass, existing exterior iron sheet, air chamber micro-ventilated and exterior panels of bamboo. The new partitions between the rooms have been re-built with mud bricks. The materials used have all been from a craftsman and/or local origin, and the works have been carried out by the inhabitants of the village, under the technical direction of ARCò.