Bill Penuel is a Distinguished Professor of Learning Sciences and Human Development in the School of Education and Institute of Cognitive Science at the University of Colorado Boulder. He designs and studies curriculum materials, assessments, and professional learning experiences for teachers in science. He works in partnership with school districts and state departments of education, and the research he conducts is in support of educational equity in three dimensions: (1) equitable implementation of new science standards; (2) creating inclusive classroom cultures that attend to students’ affective experiences and where all students have authority for constructing knowledge together; and (3) connecting teaching to the interests, experiences, and identities of learners. His research employs a wide range of qualitative and quantitative research methods, including an approach his colleagues and he have developed called design-based implementation research (http://learndbir.org).