This book represents one of a two-volume set of textbooks exploring human growth and development for professionals training to work directly with people. It provides an integrated approach to its subject, fusing together theory, research and practical application in a clear structure that is easy to follow. Drawing on debates and insights from sociology, psychology and other sources of expertise, it is uniquely wide-ranging in its coverage of models, concepts, themes and issues for understanding how children and young people negotiate crucial challenges and transitions in their lives. Throughout, the book places an emphasis on thinking critically and practicing reflectively and it foregrounds cultural diversity as an important dimension of competent and sensitive professional practice. Carefully structured to support students on their learning journey, it provides summaries, practice examples, and activities throughout to ensure readers apply and consolidate their understanding.