Rachel Valentino is a doctoral candidate in Administration and Policy Analysis and is an Institute for Education Sciences fellow at Stanford. Rachel studies the effects of early childhood education (ECE) policies and practices on a variety of child outcomes, with a particular focus on the measurement and implications of high quality instructional approaches for English learners (ELs) and racially and socioeconomically underrepresented children. For the past four years she has worked in collaboration with San Francisco Unified School District on research designed to improve the educational opportunities of their EL students. Her most recent professional experience includes her position as a researcher at the National Institute for Early Education Research (NIEER), where she worked with state departments of education to evaluate their publicly funded pre-K programs through large-scale and longitudinal research studies.