This paper discusses dynamics of educational systems that can influence professional development. It begins by suggesting that adjusting education systems to support sustained, high-quality professional development for all teachers can be compared to developing dynamic, passionate orchestras whose productions touch their audiences and bring joy and energy to their members. The paper goes on to present descriptions of and questions to consider related to: philosophy, vision, and mission of professional development; professional development activities and impacts; collaboration; context and climate; leadership, politics, and power; teachers' association roles; communications (methods of engaging the public, teachers, students, and others in decisionmaking and learning); strategic plans and the planning process; state and local governmental and teachers' association policies; and resources. An appendix presents factors influencing the success of collaboration (environment, membership, process/structure, communication, purpose, and resources). (SM)