Paul Cobb is Professor of Mathematics Education at Vanderbilt University, where he holds the Peabody Chair in Teaching and Learning. His research interests focus on instructional design, issues of equity in mathematics teaching and learning, and the improvement of mathematics teaching on a large scale. He received the Hans Freudenthal Medal from the International Commission on Mathematics Instruction in 2005 for his cumulative research program over the prior ten years, and the Silver Scribner Award from the American Educational Research Association in 2010 for research over the past ten years that contributes to our understanding of learning and instruction. He is an elected member of the National Academy of Education and an Invited Fellow of the Center for Advanced Studies in the Behavioral Sciences. A book edited by Erna Yackel, Koeno Gravemeijer, and Anna Sfard that describes the evolution of his research program was published in 2010: A Journey in Mathematics Education Research: Insights from the Research of Paul Cobb.