Mary Louise Hemmeter, Ph.D., is a professor in the Department of Special Education at Vanderbilt University. She teaches courses, advises students, and conducts research on early childhood issues. She is the cofaculty director of the Susan Gray School for Children, which is an early childhood programme for children with and without disabilities. Her research focuses on effective instruction, social–emotional development and challenging behaviour, translating research to practise, and effective approaches to professional development. Currently, she directs an Institute of Education Sciences–funded research project focused on the efficacy of implementing the Teaching Pyramid in classrooms, and she works on the National Center on Quality Teaching and Learning and the Office of Special Education Programmes–funded Technical Assistance Center on Social Emotional Interventions. She is a coeditor of the Journal of Early Intervention and serves on the editorial boards of other major journals in early childhood special education. She served as President of the Council for Exceptional Children’s Division for Early Childhood (DEC) and received the Merle B. Karnes award from DEC. Dr. Lise Fox is a professor in the Department of Child and Family Studies of the University of South Florida in Tampa, Florida and the Co-Director of Florida Center for Inclusive Communities: A University Center for Excellence in Developmental Disabilities (www.flcic.org ). Lise was the Principal Investigator of the Technical Assistance Center for Social Emotional Intervention (www.challengingbehavior.org) funded by the Office of Special Education Programs. Dr. Fox is engaged in research and training efforts related to the implementation of the Pyramid Model in early education and care classrooms, programme-wide models of implementation, and positive behaviour support. Patricia Snyder is the David Lawrence Jr. Endowed Chair in Early Childhood Studies and Director of the Center for Excellence in Early Childhood Studies at the University of Florida. She has more than 35 years experience in early intervention and early childhood as a direct service provider, programme administrator, faculty member, and researcher. She is former editor of the Journal of Early Intervention and is an associate editor for Topics in Early Childhood Special Education. Her research focuses on embedded instruction for early learning, young children’s social-emotional competence, professional development, and measurement of early childhood outcomes. She has been a principal investigator or co-principal investigator for a number of funded research and technical assistance projects focused on these research emphasis areas. Dr. Snyder has authored more than 85 articles and book chapters, has served on the editorial boards for seven professional journals, and presented more than 400 seminars, workshops, and presentations at state, national, and international conferences. She served two terms as a principal member of the early intervention and early learning in special education review panel for the Institute of Education Sciences, is a member of the Division for Early Childhood Recommended Practices Commission, and has received numerous awards for her research, teaching, and service contributions to the field, including the Mary E. McEvoy Service to the Field and Merle B. Karnes Service to the Division awards from the Division for Early Childhood of the Council for Exceptional Children.