Departmental improvement is the key to whole school improvement. This book complements existing programs of professional development and training on both national and local levels. Heads of department and subject leaders in secondary schools will find this professional handbook essential for planning in-service training, improving the effectiveness of the department, and developing personal leadership abilities. This book combines well-founded professional development theory with practical suggestions. It has been written in an open and accessible way with photocopiable inset activities that have been tried and tested in training situations.