This volume provides an up-to-date and comprehensive reference guide to the key concepts, ideas, movements, and trends of applied linguistics for language teaching. With over 300 hundred entries of varying length, the volume includes essential coverage of language, language learning, and language teaching. Written in an accessible style, the entries draw attention to the practical teaching implications of the ideas under discussion, and contain selected bibliographical information for further guided reading. The volume will be invaluable to students of applied linguistics, language teaching, TESOL, and related subject areas.