Title Preparing early childhood educators to teach math : professional development that works / edited by Herbert P. Ginsburg, Ph. D., Teachers College Columbia University, New York, New York, Marilou Hyson, Ph. D., University of Pennsylvania, Philadelphia, and Taniesha A. Woods, Ph. D., Say Yes Education, Inc., New York, New York ; Sue Bredekamp, foreword ; contributors Kimberly Brenneman [and seven others].