Education in the twenty-first century witnessed a profound shift in emphasis from the teacher to the learner, or from pedagogical inputs to learner outcomes. According to neoliberal logic, the teacher is the primary value-add in a relationship that is best characterized as cause (instruction) and effect (learner outcome). As a result, the problem of teacher quality has emerged as the central question of our day. What is effective teaching? What does teacher quality look like? Traditional music educators will posit that excellence in norm-governed forms is the most reliable measure of teacher quality. This essay makes a case for a richer and more varied conception, embracing diversity and openness as defining ideals.