This handbook provides information on how to use comprehensive schoolwide models to improve learning for more students. It paves the way for creating programs under Title I of the Elementary and Secondary Education Act (ESEA) that are grounded in the lessons of successful Chapter 1 schoolwide programs. Following the executive summary and introduction, the first chapter examines schoolwide programs as a catalyst for Chapter 1 reform. Chapter 2 examines the context for Chapter 1 schoolwide projects. Successful schoolwide projects anticipate high standards and recognize three key factors--leadership and planning, academic focus through instructional flexibility, and accountability. The third chapter identifies promising practices and their key features, which include an agreed-upon vision, academic focus, planning and design, management and organizational structure, professional development, cultural inclusiveness, parent and community involvement, and evidence of student progress. Chapter 4 analyzes challenges and opportunities for schoolwide projects, such as planning adequate time to learn new roles and prepare for new resources, enhancing communication and involvement, moving beyond reduced class size, including parents and community, stabilizing change, and monitoring achievement variability. The final chapter offers profiles of 12 effective schoolwide projects at various elementary and primary schools. Appendices contain contact information, and materials for schoolwide planning and project implementation. Contains 114 references. (LMI)