Douglas H. Clements, Distinguished University Professor, Kennedy Endowed Chair in Early Childhood Learning, and Executive Director of the Marsico Institute for Early Learning at the University of Denver, has published over 166 refereed research studies, 27 books, 100 chapters, and 300 additional works, including the development of new mathematics curricula, teaching approaches, teacher training initiatives, and models of “scaling up” interventions. These projects produced the free online Learning and Teaching with Learning Trajectories. He has served on the U.S. President's National Mathematics Advisory Panel, the Common Core State Standards committee of the National Governor’s Association and the Council of Chief State School Officers, the National Research Council’s Committee on Early Mathematics, the National Council of Teachers of Mathematics national standards committees, and is a co-author on each of their reports. A prolific and widely cited scholar, he has earned external grant support totaling over $25 million, including 36 major grants from the National Science Foundation, the National Institutes of Health, and the Institute of Education Sciences of the U.S. Department of Education, Heising-Simons Foundation, and the Bill & Melinda Gates Foundation. Additional information can be found at http://du.academia.edu/DouglasClements, http://www.researchgate.net/profile/Douglas_Clements/, and http://portfolio.du.edu/dclemen9.