The Tree-House School is a modular educational center that can include all the phases of the educational process: Kindergarten, Primary and Secondary schools. All the required spaces are fitted into two rings: the massing articulation allows to create two courtyards and an additional usable roof. The building is designed as a ‘tree-house’ and it is distributed through multiple levels, where also roofs are usable and where indoor and outdoor spaces are combined allowing high flexibility for educational activities. The school of the future has to be sustainable and at the same time, be able to sustain the new post-covid requirements. It has to be outdoor spaces inclusive and open to nature, made of natural materials and low-cost construction techniques, as modular design. It has to be highly flexible and able to be adapted to different functions and programs, and provide several benefits to the whole community.