Innovative and evidence-based, this introduction to the main concepts and issues in language teaching uses a 'key questions' structure, enabling the reader to understand how these questions have been addressed by researchers previously, and how the findings inform language teaching practices. Grounded in research, theory and empirical evidence, the textbook provides students, practitioners and teachers with a complete introductory course in language teaching. Written in a clear and user-friendly style, and avoiding use of jargon, the book draws upon real-life teaching experiences and scenarios to provide practical advice. A glossary of key terms, questions for discussion and further reading suggestions are included. The book is perfectly suited to language teaching modules on English language, TESOL and applied linguistics courses.