Greg Nelson, Ph.D. has spent the last 35 years involved in early childhood education as a classroom teacher, center owner and director, intern trainer, workshop presenter, author, early childhood consultant, and university instructor. His interests include devising curriculum to support the emergence of early math and science literacy in children, and exploring the interface of developmentally appropriate practice and world-class educational standards. Author of A Teacher's Bag of Tricks and Math at Their Own Pace , he currently serves as professor of early childhood education at Bridgewater State University in Massachusetts and is president of the Massachusetts Association of Early Childhood Teacher Educators.