This final chapter of The Oxford Handbook of Preservice Music Teacher Education in the United States synthesizes suggestions from the previous 42 chapters in the areas of teacher education practice, research, and policy. It reviews the boundaries that need to be pushed in music teacher education, such as those related to issues of diversity, equity, and inclusion. It summarizes the challenges to that work and directs the reader to specific chapters that have covered this subject in detail. Personal reflections from P-12 teachers are incorporated throughout the chapter to illustrate the boundaries they have tried to push and the challenges they have face in doing so. Before concluding, the chapter discusses agendas for change within the field.