Stephanie Sisk-Hilton is an assistant professor of elementary education at San Francisco State University. She received a Ph.D. in cognition and development from the University of California–Berkeley and a masters degree in education policy and administration from Stanford University. She has been a teacher of elementary grades and of middle school math and science in Prince George’s County, Maryland; Atlanta, Georgia; Brooklyn, New York; and Oakland, Califronia. She has also worked extensively as a teacher professional developer dealing with schoolwide curriculum reform and with science curriculum and pedagogy.