Catherine Lewis is a researcher at Mills College at Northeastern University in Oakland, California who has conducted research in Japanese schools for four decades. Akihiko Takahashi is a professor emeritus of mathematics education at DePaul University and an internationally renowned elementary teacher. Shelley Friedkin is an instructional coach at John Muir Elementary School in San Francisco, California. Nora Houseman is program director for professional learning in the Alameda County Office of Education, California. Sara Liebert served as teacher, instructional coach and principal at John Muir Elementary School and currently works at Apple.