The aim of the project is to complement the existing school with a sports hall and workshops-classrooms as well as reorganizing the kitchen. Grafted onto the existing canteen, the first one-storey volume accommodates the new kitchen, storage spaces, a service lift and an unloading bay. The main volume of the extension is a continuation of the existing structure, and, like it, is two storeys high. It accommodates the practical workshops and the sports hall, which is situated at the front part of the building to benefit from the natural light on three sides. The various spaces are accessible without having to go through the existing building, which ensures the new functions operate independently. There is also a second workshop on the second floor. This looks out onto a flat roof, which can be used for practical roofing workshops. This exterior space overhangs the playground and its specific function creates a playful break in the interpretation of the volumes. Responding to a specific programme demand, this suspended patio creates a tension between the extension and the existing uniform structure. The first floor is accessed by external stairs, which go all the way up to the roof.The design of the facades and the materials of the new construction help subdue the stylistic differences of the adjacent buildings. Like Lego, imposing rectangular surfaces in wood and translucent polycarbonate make the building appear like a juxtaposition of distinct boxes, their chromatic pallet harmonizing with the original construction. Mysterious, the only signs of the structure's function are the openwork stairs that give onto the playground at the front and the glazed cut outs in the translucent partitions. The same level of abstraction is achieved inside. The solid surfaces and the diffuse light together with floorcoverings in concrete guardrail provide the spaces with a great purity.