In a planned but empty environment we had been asked to design a school in front of a square. We place a bar facing this square with two different entrances (the scholar one and the public uses for weekend) and containing administration, kitchen and sports hall. Two perpendicular bars of one and two floors contain the kindergarten and primary classrooms respectively. The construction system of laminated wood walls and floors reduces CO2 emissions and ecological footprint of the building. 800m3 of timber used, 800Tn of CO2 safeguarded.