This handbook was designed to support Colorado schools as they make the transition from a traditional school structure to that of a comprehensive schoolwide program. It contains practical information, activities, and suggestions to assist with the development of the individual components that comprise the schoolwide planning process. The guide features 9 components considered to be essential for the successful planning and implementation of the schoolwide program: (1) change and leadership, which outlines the change process and identifies components of successful change models; (2) preparation, which provides information to develop an organizational framework; (3) schoolwide focus, which highlights the steps involved to engage the entire school community; (4) internal analysis, which addresses the importance of comprehensive data; (5) desired results and measurable goals, which uses the findings of the internal analysis to identify school strengths and needs; (6) action strategies, which assist in the identification and development of research-based instructional or organizational strategies; (7) professional development and its importance in the process; (8) evaluation, which discusses the development of accountability systems; and (9) the schoolwide plan, which pulls everything together. Although the components are presented sequentially, the schoolwide planning process should not be viewed as linear in implementation. An appendix features information on schoolwide fiscal guidance and other important issues. (Contains 12 resources.) (RJM)