The OBDP collaborative platform is part of a logic of sustainable development, and aims to allow teachers and future teachers of cycles 1, 2 and 3 to sell and buy second-hand books and educational tools. O Bonheur des Profs was developed by teachers for teachers, so that books and tools that are no longer useful to you no longer clutter your shelves and find a second life in other colleagues, in other rooms. class. OBDP offers first degree and cycles 1, 2 and 3 teachers a high-performance, modern and secure environment.