Catherine Lewis, Ph.D., comes from three generations of public school teachers. She has conducted research in Japanese and U.S. schools for more than three decades, publishing the first English-language accounts of Japanese lesson study. A research scientist at Mills College, Lewis has developed video and print materials that have introduced many educators to lesson study. She has directed seven multi-year research projects funded by U.S. federal agencies, and her randomized, controlled trial of lesson study with mathematical content resources (Rebecca Perry, Co-PI) was identified by a What Works Clearinghouse criteria review as one of only two studies of mathematics professional learning (of 643 reviewed) to meet scientific criteria and positively impact students’ mathematical proficiency
