The ideal book for those studying or practising language teaching or applied linguistics. Teaching materials play a crucial role in teaching-learning. When these take the form of a textbook it is essential that the textbook is carefully selected to meet both external requirements and the needs of the teachers. It is also important that teachers are able to mediate between the textbook and the learners, adapting and supplementing the book as necessary. Provides a systematic approach to the selection and subsequent evaluation of coursebooks, this textbook gives practical advice on adaptation and supplementation. For teachers who prefer to prepare their own materials there are suggestions on systematising the process of materials development and on the use of learner-generated materials. Key features: * Includes reference to the use of concordances and the internet * Contains numerous examples * Interleaved tasks which can be utilised by an instructor * Features an extensive bibliography The book will be of particular value to practising teachers following a modular Masters course or involved in some other form of professional development, whether organised or self-directed.