She has engaged in lesson study work for the past fifteen years and is considered as one of the prominent lesson study scholars in the field. Her research focuses on how teachers and students learn through lesson study, and she has published widely in high-impact journals and books. She has conducted multiple research projects with lesson study internationally, as well as supported various lesson study efforts by giving presentations, facilitating lesson study groups, and serving as a knowledgeable other. Her work meaningfully bridges theory and practice, by providing theoretical background for teachers to make sense of classroom practices, while informing research with classroom-based data. She addresses teacher learning at different professional levels and provides a cross-cultural lens in implementation of lesson study.