A program to reinforce English-as-a-Second-Language (ESL) learning through participation in a choral performance group (Los Cumbancheros) is described and evaluated. The program served 218 students in 5 intermediate and junior high schools and 2 elementary schools in the Bronx (New York). Most students were classified as limited English proficient; some English-proficient and special-education students were also served. Instruction was offered in Spanish native language arts (NLA), ESL, and music and music theory. Students participated in choral performances or in a percussion and dance group. Groups performed at a variety of multicultural activities throughout the school year. Staff development and parental involvement activities were also offered. Evaluation of the program found it met its objectives in NLA, ESL, music theory, English and Spanish oral language proficiency gains, and participation in cultural and educational events. It partially met objectives for staff development and parental involvement. Recommendations for program improvement include: exploration of ways to document student achievement more fully; holding the required number of training sessions for teachers; and increased effort to interest parents in attending workshops. Staff information, scheduling information, performance calendar, school newspaper article, and list of instructional materials and songs are appended. (MSE)