Richard Lehrer is the Frank W. Mayborn Professor of Education at Vanderbilt University’s Peabody College. Previously, he worked at the University of Wisconsin, Madison, where he was associate director of the National Center for Improving Student Learning and Achievement in Mathematics and Science. He collaborates with teachers to craft, implement, and assess modeling approaches to mathematics and science education in the elementary and middle school grades. He has also formulated innovative geometry instruction for primary- and elementary-grade students that is guided by longitudinal study of student thinking about space. He is a former high school science teacher and has pioneered classroom research that investigates cognitive technologies as tools for thought in mathematics and science. He has served as a member of the National Research Council’s Committee on the Foundations of Assessment, the National Research Council Committee on Systems of Statewide Science Assessment and the NAE/NRC Committee on Engineering in K-12 Education. He has a Ph.D. in educational psychology and statistics from the University of New York, Albany.