In order not to impair the view of the nearby park and the daylighting of the adjoining housing, this school was designed as an elongated, single-storey structure articulated by five open courtyards. The crenellated form of the facade was constructed with insulated, prefabricated concrete sandwich units in three different colours, permitting a swift construction process independent of weather conditions. Despite the 240 different units, this solution also proved to be the most economical. Lightweight partitions, only a few load-bearing internal columns, plus an in-situ concrete roof allow flexible spatial configurations, which is of relevance in view of sinking number of pupils and a possible change of use in the future.