The purpose of this study was to specify and test a model detailing (a) gender, (b) previous elective music experience, (c) school, (d) music self-concept, and (e) music values as predictors of music enrollment and the initial juncture of school-sponsored elective music participation. In the event that a model with adequate fit was retained, a further purpose of this study was to calculate the direct, indirect, and total effects of each predictor, thereby determining each predictor's relative contribution towards explaining variance in elective music enrollment. Participants included fifth-grade students (N = 148) from two elementary schools. Data were gathered via administration of the Motivators of Elective Music Participation Questionnaire, and by accessing middle school elective enrollment records. The proposed expectancy-value model of elective music participation demonstrated excellent fit and was retained for interpretation. Overall, the model accounted for 34.4% of the variance in elective music participation. The greatest total predictor of elective music participation was previous elective music experience, followed closely by music values. Music self-concept, gender, and school played negligible roles in predicting whether students opted in or out of sixth-grade music electives.