Oxford Key Concepts for the Language Classroom focuses on key topics for teaching English as a second or foreign language. These instructional guides are informed by research in second language acquisition and language pedagogy, and show the relevance of theory to the practising teacher. This series is for teachers of English as a second or foreign language for learners aged 5-18. It is suitable for students working towards MA TESOL, graduate certificate, or diploma qualifications, and for practising teachers' professional development programs.