Equitable and effective CS instruction is essential for broadening participation in computing, responding to the growing demand for computer scientists, and guiding the expansion of CS at the K12 level. Harvey Mudd College's Colleen Lewis shares a brief background of her work in this area and current projects from two newly-funded five-year NSF grants focused on understanding and optimizing CS learning, and understanding and removing barriers to CS. Series: "Computer Science Channel" [Science] [Education] [Show ID: 35381]