Participation in religious and philosophical education in classes 1 to 10 is voluntary in the state of Berlin. The legal guardians decide on the participation of their child by a written statement to the Headmistress. After reaching the age of 14, the pupils themselves decide to participate.
In Berlin, religious and philosophical instruction is a matter for the religious and philosophical communities (§ 13 School Law Berlin). Nine religious and philosophical communities offer instruction in schools (https://www.berlin.de/sen/bildung/unterricht/faecher-rahmenlehrplaene/religion/).