Each chorale is presented in the Kjos Multiple Option Scoring System with all four voice parts (soprano, alto, tenor, and bass) presented in each part book. This allows for unprecedented teaching oppourtunities. Unison playing will help develop the quality of string orchestra's sound, and is the foundation of playing in tune. AS additional parts are added, students learn the nuances of harmony and expressive playing. Students love playing chorales, because they sound so good! Teachers will love using the power of unison playing and four part harmony to develop superior intonation and expressive playing in their string ensembles.