University of Pennsylvania. A fellow of the American Statistical Association, he has received awards for his work on research methods and policy from the American Educational Research Association, the American Evaluation Association, and the Policy Studies Association. He is the author of nearly 150 scholarly papers and author or editor of a dozen books on topics ranging from evaluation of AIDS prevention programs and social experiments to assuming confidentiality of data in social research. His most recent book is titled Randomized Experiments for Planning and Evaluation: A Practical Guide, 1997, published by Sage. He earned a Ph.D. in psychology from Iowa State University.

Jere Confrey is professor of education, University of Texas at Austin. She directs the Systemic Research Collaborative for Mathematics, Science, and Technology (SYRCE) and cofounded the UTeach teacher preparation program for grades 4-12. She is vice chair of the Mathematical Sciences Education Board of the National Academy of Sciences. She was the founder of the SummerMath program for young women at Mount Holyoke College and cofounder of SummerMath for Teachers. Her research focuses on urban school reform, systemic change models, and children’s understanding of multiplication, division, ratio and trigonometry. She is coauthor of the software Function Probe, Class Tab, and of sets of interactive diagrams for illustrating core mathematical ideas. She has served as vice president of the International Group for the Psychology of Mathematics Education, chair of the SIG-Research in Mathematics Education, and on the editorial boards of the Journal for Research in Mathematics Educational and the International Journal for Computers in Mathematics Learning. She has been a member of the Department of Education’s Expert Panel on Technology, and has taught school at the elementary, secondary, and postsecondary levels. She received a Ph.D. in mathematics education from Cornell University.

Rudolph Crew is the director of school reform initiatives at the Stupski Family Foundation in Mill Valley, California. He previously served as the first executive director of the University of Washington’s new Institute for K-12 Leadership, and affiliate professor of leadership and policy studies in the College of Education. Prior to joining the University of Washington, Crew was chancellor of New York Public Schools for 4 years. He has also served as superintendent of the Tacoma Public Schools and the Sacramento



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