The "Notes & Reflections" newsletter offers practical information--ideas, strategies, tools, and resources--about topics of special interest to professional developers who are working to improve school performance. Today, professional development services to schools are provided by variety of people: teacher leaders; principals; and district, regional, and state education staff--to name just a few. If you are one of these providers, "Notes & Reflections" will help you build your capacity to plan and implement powerful professional development. Contents of this issue include: (1) Keep Professional Learning on Track with Evaluation; (2) Evaluation: An Essential Tool for Managing Professional Development; (3) Level 1: Evaluate Teacher Reactions; (4) Level 2: Evaluate Teacher Learning; (5) Levels 3-4: Evaluate Organizational Support and Classroom Implementation; (6) Level 5: Evaluate Student Learning Outcomes; (7) Organizing the Evaluation; (8) References; and (9) Evaluation Resources. (Contains 1 table.) [Jonathan Margolin was a contributing author for this issue.]