Level 1 Treble Student 1-Pak-ESSENTIAL REPERTOIRE is a core library of time-tested choral works which provide a framework for teaching style and history all through performance. The graded series includes Masterworks (Renaissance through Contemporary) Folksongs (American and Multicultural) Spirituals A Cappella and Accompanied works. The series is available for beginning through advanced choirs and for mixed treble and tenor bass ensembles.