Book excerpt: One of the greatest resources a school has is its staff. How teachers themselves, and their work, are defined are therefore matters of utmost importance. Major trends of increased control and 'new mangerialism' are occurring in most OECD countries, radically altering both the content and form of teacher education. This book outlines recent changes in teacher education and professional development and, by drawing on recent research findings, explores the positive and negative impacts on the nature of teaching and the shape of the profession.