Lizzy Hull Barnes, M.Ed, is the Supervisor of Mathematics and Computer Science at San Francisco Unified School District. She has taught math to preschool through adults in schools in Louisiana and around the Bay Area and has supported fellow teachers and coaches in San Francisco. She believes the Common Core has provided educators a window to reframe the question, "What does it mean to be good at math?" and through her work aims to recapture mathematics as a multidimensional discipline for her district’s students. Hull Barnes has presented SFUSD’s work in multiple venues including the National Academies of Science, Engineering, and Medicine, the Council of Great City Schools, the National Council of Teachers of Mathematics (NCTM), the California Math Council (CMC), and the National Council of Supervisors of Mathematics (NCSM). She has published articles in EdSource and NCTM’s Catalyzing Change. She has also supported Stanford workshops with Professor Hilda Borko to think through the core attributes of a research practitioner partnership, considering both relationship and research design. She has collaborated with fellow math educators in multiple spaces, including intersegmental work designed with the Dana Center at UT Austin and the Conference Board of Mathematical Sciences (CBMS). Hull Barnes received her Masters degree in Education, with an emphasis on Early Childhood, from Mills College in Oakland, and her Administrative credential from the Leadership Support Program (LSP) at UC Berkeley’s Graduate School of Education.