REPERTOIRE books provide a core library of time-tested choral works, including Masterworks (from Renaissance to Contemporary), Folk songs (American and multicultural), and Spirituals. Books are provided for mixed, treble, and tenor-bass choirs. The student edition contains customized lesson for each song: . Background information about the song or composer . Cultural content . Musical terms . Preparation exercise . Evaluation activities In addition: . Complete glossary . Level 1 available for 2-part/3-part voices . Level 2-4 available for mixed, treble, and tenor-bass voices Level 4 Repertoire books provide a comprehensive choral library with 54 titles in the mixed, treble, and tenor-bass books of Level 4."