Marilou Hyson, Ph.D., is a consultant in early child development and education and adjunct professor in the University of Pennsylvania’s Graduate School of Education. Formerly associate executive director of the National Association for the Education of Young Children (NAEYC), Marilou also served as professor and chair of the University of Delaware’s Department of Individual and Family Studies. At NAEYC, Marilou contributed to the development of position statements on early childhood curriculum, assessment, and program evaluation; early learning standards; early childhood mathematics; and professional preparation; she also worked on accreditation and national recognition for 2- and 4-year higher education programs. Most recently, Marilou has consulted with the World Bank and Save the Children on early childhood projects in Indonesia, Vietnam, Bangladesh, and Bhutan. A former editor-in-chief of Early Childhood Research Quarterly and a former executive branch fellow of the Society for Research in Child Development, Marilou’s publications have emphasized young children’s emotional development and approaches to learning, global efforts to develop and evaluate early childhood services, and early childhood professional development. She is the author of The Emotional Development of Young Children: Building an Emotion-Centered Curriculum and Enthusiastic and Engaged Learners: Approaches to Learning in the Early Childhood Classroom, both published by Teachers College Press.