A school building has to fulfill many things today: Pedagogical concepts develop dynamically away from frontal teaching, towards autonomous studying in groups – but the reality looks often different. The introduction of the whole day school is regarded with equal euphoria and scepticism. New spatial demands have to therefore find equally consideration as a high measure of flexibility. Under economical pressure, concentration should be possible on a minimum amount of space, as well as informal exchange, free play and physical activity.The outdoor school in the Cliostraat in Amsterdam from Johannes Duiker (1930) serves as inspiration for a school building with a spatial structure, that involves the surrounding and creates places for informal learning and life. During good weather, a teaching unit or group work can be moved to the outside. The school building embraces a court space, in which the circulation of the school is situated completely externally. The building is conceived as a sort of stacked campus, where the clusters of the school are connected through an informal exterior vertical yard. It carries the same spirit as the gallery access of the housing complex, and acts as a urban and social catalyst.