Emeritus of Mathematics at the University of Chicago, where he was a faculty member from 1963 to 1986. He also served as Vice President for Research at Rutgers University from 1986 to 1991. Browder is the immediate Past President of the American Mathematical Society and was awarded the Presidential National Medal of Science in 1999. He is a member of the National Academy of Sciences (NAS) and the American Academy of Arts and Sciences. He has served as a member of the Council of the NAS and its Committee on Science, Engineering, and Public Policy. His research interests include topological methods in analytical problems; history and philosophy of mathematics and science; problems of scientific organizations and institutions; and mathematics and science education.

Thomas Carpenter is Professor of Curriculum and Instruction at the University of Wisconsin-Madison. He is currently Director of the National Center for Improving Student Learning and Achievement in Mathematics and Sciences, and he is a former editor of the Journal for Research in Mathematics Education. Along with Elizabeth Fennema, Megan Franke, and others, he developed the Cognitively Guided Instruction research and professional development project. His research investigates the development of children’s mathematical thinking, how teachers use specific knowledge about children’s mathematical thinking in instruction, and how children’s thinking can be used as a basis for professional development. He is currently focusing on the development of algebraic thinking in elementary school. Carpenter received a B.S. from Stanford University and a Ph.D. from the University of Wisconsin.

Carolyn Day is Associate Director for Elementary Mathematics and Science for the Dayton Public Schools in Ohio. She has been with the district for 28 years, first as an elementary teachers, then as a teacher of mathematics in grades 6 through 8, and for the past 10 years as a mathematics supervisor. Day has a B.S. in elementary education from Central State University in Wilberforce, Ohio, and an M.Ed, in curriculum, instruction, and administration from Wright State University. She currently serves on the board of the Ohio Mathematics Leadership Council, the Aullwood Audubon Center in Ohio, and the National Council of Supervisors of Mathematics as secretary.

Karen Fuson is Professor of Education and Psychology in the School of Education and Social Policy at Northwestern University. She received her B.A. in mathematics from Oberlin College and her M.A.T. and Ph.D. from the University of Chicago. Her research interests concern young children’s



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