This sequel to Materials Development in Language Teaching suggests that the informed and reflective practitioner is the ideal agent for mediating between the practice and theory of language teaching. The contributors are teachers, materials developers, applied linguists, teacher trainers and publishers, sharing four things in common: experience as teachers of a second or foreign language, contribution to the development of second language materials, knowledge of developments in linguistic and psycholinguistic theory, and respect for the teacher as the person with the power to decide what actually happens in the classroom. The text is a course book for materials development courses, a resource book for teachers working on materials development, a follow up book for workshops on the subject, and a stimulus book for in-service practitioners.