It is the purpose of this study to set forth facts, substantiated by investigation of authoritative sources, proving that all selections used on the concert program of a high school chorus should serve a permanently constructive purpose toward the musical growth of the students. The first part of the thesis concerns those elements which have to be taken into consideration in teaeching any high school music group These are: 1. The psychological make-up of the group in regard to age and physical development. 2. The psychological make-up of its audience. 3. The existing level of musical skill of the group as a whole. 4. The existing degree of aesthetic appreciation of the chorus and its audience. The latter part of the work specifies the aims in vocal instruction of the high school choral course. These include sight reading, breathing, tone, pitch, diction, phrasing, and interpretation. It also attempts to demonstrate how the preparation of a concert program serves to accomplish these aims. This involves a critical evaluation of each number on a proposed program in reference to the following points: 1. Psychological reception by the group and its audience. 2. Its contribution toward improved aesthetic discrimination on the part of singers and listeners. 3. The opportunity afforded for specific vocal and musical training.