Catherine Lewis is a distinguished research scholar at Mills College in Oakland, California. With colleague Rebecca Perry, she has conducted a series of federally-funded research studies that illuminate how lesson study is successfully adapted and sustained in the U.S., including recent randomized trials that demonstrate the impact of lesson study on students' learning and teachers' learning. Fluent in Japanese, Lewis published the first English-language articles and videotapes on lesson study. She is a graduate of Harvard University (B.A.) and Stanford University (Ph.D) and the author of more than 40 publications on elementary education and child development, including the award-winning book Educating Hearts and Minds: Reflections on Japanese Preschool and Elementary Education (Cambridge University Press, 1995).