The Index for Inclusion, written by Tony Booth and Mel Ainscow, is a major publication from CSIE to help guide schools through a process of inclusive school development. It encourages the widest scrutiny of school life and involves a self-review of a school's cultures, policies and practices. Through a deep exploration, barriers to learning and participation are identified, priorities for development are determined and plans are put into practice to help build supportive communities which foster high achievement for all students.