This book provides an introduction to the theory of positive psychology and a practical guide on how to implement the theory in (primarily secondary) schools. There has recently been an explosion of interest in positive psychology and the teaching of well-being and 'happiness' in PSHE in schools and many teachers are looking for clear information on how to implement these potentially life-changing ideas in the classroom. Wellington College, where Ian Morris is head of philosophy, religion and PSHE, is among the first UK schools to introduce a formal well-being and happiness curriculum developed by the author.