This booklet outlines key principles that ideally characterize partnership governance structures and processes in professional development school (PDS) settings, discussing the advantages and disadvantages of the various decision making structures and processes currently employed by PDS partnerships. The booklet provides a self-assessment tool for evaluating individual partnerships and illustrates how some existing partnerships have crafted formal arrangements. Chapter 1, "Governance Challenges Facing Professional Development Schools," discusses critical tasks of governance and examines process challenges. Chapter 2, "Models of PDS Governance," explains the three basic linkages in PDS partnership structures: liaisons, school or site steering committees, and multisite coordinating councils. They are not mutually exclusive, and some partnerships have all three. Chapter 3,"What Governance Works Best?" explains there is no one structure that is recommended as the optimal governance model. Chapter 4, "Tool Kit for Analyzing Governance Needs," looks at critical tasks (building bridges, supporting mutual renewal, managing day-to-day tasks, and assessing and planning for the long term) and process challenges (working with and transforming existing governance, balancing spontaneity with structure, promoting parity and equity, and connecting people and institutions). Chapter 5, "Sample Agreements," provides samples from the website of the American Association of Colleges for Teacher Education. Chapter 6 contains 2 references and a 10-item bibliography and resources list. (SM)