Stephen D. Krashen is an influential and prolific author, linguist, and researcher who has written nearly 500 books and articles in the fields of literacy, language acquisition, neurolinguistics, and bilingual education.Sy-Ying Lee is currently professor at National Taiwan University of Science and Technology and chair of the Department of Applied Foreign Languages.Christy Lao, PhD, is a professor of education, founding director of the Confucius Institute at San Francisco State University, coordinator of the Chinese Bilingual Program, and principal investigator and director of several major federal projects.