David Nunan is a language teacher, teacher educator, researcher, consultant and author. He has published over 30 academic books on second language curriculum design, development and evaluation, teacher education, and research. Jack C. Richards is an applied linguist, teacher educator, and textbook author, a specialist in the teaching of English as a second language (TESOL) who has had an active career in the Asia Pacific region (Singapore, Hong Kong, Indonesia, Hawaii) for many years. He is an honorary professor at the University of Sydney.