Melissa M. Soto is a Clinical Associate Professor of Mathematics Education at the University of Florida. She has facilitated Lesson Study (LS) groups with Kindergarten, 3rd-5th grade teachers and served as a Mathematics and Equity Commentator. Dr. Soto has spent 15 years providing Cognitively Guided Instruction mathematics professional development (PD) to K-6th grade teachers throughout the U.S. In Fall 2016, Dr. Soto and three colleagues from across the U.S. began engaging in LS as a form of PD for Mathematics Teacher Educator.