There are 550 pupils at Salpausselkä School. The school staff played a key and active role in the school design process. The teaching staff jointly defined the functional objectives for the learning environments and the interior design guidelines that covered the lobbies, offices, staff facilities, meeting rooms, offices and the dining hall. The teachers wanted to have a colourful, happy environment, which is nicely reflected throughout the school. The backbone of the design consists of five main colour themes that are repeated in different rooms and spaces. All corridors are painted the primary colours, which also help students find their way around the school building.