This book is written for all those interested in teachers’ classroom practices, teacher beliefs, teacher professionalism, implementation of educational reforms in general and high stakes assessment reforms in particular. Using the foundational work of ten teachers in Hong Kong who tried to change their practice following a reform in their assessment system, it presents case histories that have universal application and can be used by teachers anywhere to uncover and clarify their own educational belief and philosophies of education. In addition, these case histories can serve as examples of practice and as a source of models of practice that teachers can apply and test in their own classrooms. This book will also serve as a useful source of curriculum material for teacher professional development courses and activities.