Professor Tony Booth, Research Fellow at the Centre for Commonwealth Education, talks about the new edition of 'The Index for Inclusion: developing learning and participation in schools'. Professor Booth has taught, researched and written about issues of inclusion and exclusion in education for the last thirty years. His ideas are summarised within the 'Index for Inclusion; developing learning and participation in schools' which has been translated into 39 languages. He has recently produced a radically revised version to create dialogues for the 2nd decade of the 21st century, the decade of biodiversity, about educational development and informal and formal curricula in schools.