Rebecca A. Thessin is an Associate Professor of Educational Administration at The George Washington University Graduate School of Education and Human Development. She conducts research in the areas of instructional leadership, principal professional learning, school and district improvement, and leadership preparation. Her work appears in both peer-reviewed and practitioner journals, including Leadership and Policy in Schools, Journal of Research on Leadership Education, Journal of School Leadership, Journal of Educational Administration, Planning and Changing, and Kappan Magazine, among others. She has partnered with numerous local districts to further their own improvement efforts and has received funding from the Wallace Foundation, the Spencer Foundation, AERA, and the Claude Moore Foundation to support this work. At GW, Dr. Thessin serves as the instructor for numerous courses in the Educational Administration program, including Advanced Instructional Leadership for School Improvement, Instructional Leadership for School Improvement, Internship, and Leading Evidence-Based Action Research for School Improvement. Prior to her current position, she was most recently the Chief School Improvement Officer for the Montgomery County, Maryland, Public Schools, and she had served as the Associate Superintendent for Professional Development and School Support for this same district. She previously was the Director of School Improvement and Professional Development in the Stamford, CT Public Schools, and she began her career in education as a high school teacher. Dr. Thessin holds a doctorate in the Urban Superintendency from the Harvard Graduate School of Education (HGSE), two Master’s degrees from HGSE and a bachelor’s degree in History and Teacher Preparation from Yale University.