Warming Up for Cello Book One combines exercises with pieces at a third-year playing level. Each exercise and song is included as version A for lower level players and as version B for higher level players. Both version A and version B can be played together allowing students of different levels to play and learn together in the same class. The book can be used as part of a string class in conjunction with Warming Up for Violin Book One Warming Up for Viola Book One and Warming Up for Bass Book