Katherine K MersethDr. Katherine K. Merseth, the principal investigator of this study, has over forty years of experience in instruction, administration, and research in public education in the United States and internationally. She taught math in traditional public midle and high schools for ten years, has provided instruction in math pedagogy, and is the director of the Harvard Graduate School of Education (HGSE) Teacher Education Program, which she founded in 1984. Read More Read Less