Chorissimo is a comprehensive collection of materials for young choirs, centered around the choir book "Chorissimo," which contains 164 choral pieces. This choir book serves as the foundation of a concept that aligns with the current choir situation in terms of repertoire selection and instrumentation, allowing almost all pieces to be performed with just one male voice. The stylistic range spans from pieces of old vocal polyphony to more contemporary choral music. Overall, Chorissimo does not merely offer standard repertoire but sets benchmarks for demanding choral work in schools and beyond. It has been developed in collaboration with the State Academy for the Musically Active Youth in Baden-Württemberg and commissioned by the Association of German School Musicians.