The Complete Guide to the Theory and Practice of Materials Development for Language Learning provides undergraduate and graduate-level students in applied linguistics and TESOL, researchers, materials developers, and teachers with everything they need to know about the latest theory and practice of language learning materials development for all media. The past two decades have seen historic change in the field of language learning materials development. The four main drivers of that change include: a shift in emphasis from materials for language teaching to language learning; evidenced-based development; the huge increase in digital delivery technologies; and the wedding of materials developed for the learning of English with those for other second or foreign languages. Based on an exhaustive review of the world literature on the subject, as well as their decades of experience as materials developers and researchers, the authors address these issues to offer comprehensive coverage of all aspects of contemporary language learning materials development. Combining a highly accessible style and presentation with academic rigor, this book has many pedagogical features including numerous "think questions" and tasks, as well as a list of valuable resources freely available to materials developers, in order to stimulate readers and provoke debate in the field. Timely, authoritative, and global in scope, The Complete Guide to the Theory and Practice of Materials Development for Language Learning is an indispensable resource for all those studying and working in the field of language learning.