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Professor Jack C. Richards is an internationally recognized authority on methodology, teacher development, and materials design, and has taught in universities in the United States, Hong Kong, Singapore, New Zealand, Canada, Indonesia, and Brazil. He has also lectured and consulted in East Asia, North and South America, Europe, and the Middle East. Professor Richards' many successful texts and teacher-training books include Approaches and Methods in Language Teaching and Beyond Training.

Jonathan Hull has taught in Britain, Jordan, Oman, the United States, and Micronesia. He has also been a university lecturer in Hong Kong and Japan. His main professional interests are curriculum design and materials development, and his main research interest is in reading. He is currently a doctoral candidate at Glasgow University, UK.

Susan Proctor has taught in many institutions and universities - in Japan, Hong Kong, Hawaii, and her native state of California. She has also co-authored two major ESL textbook series along with a beginning level oral communication text. In addition, she has translated and prepared the American English editions of several British English textbook series.