Turtle Geometry

Hal Abelson is Class of 1922 Professor of Computer Science and Engineering at Massachusetts Institute of Technology and a fellow of the IEEE. He is a founding director of Creative Commons, Public Knowledge, and theFree Software Foundation. Additionally, he serves as co-chair for the MIT Council on Educational Technology. Andrea diSessa is Chancellor's Professor in the Graduate School of Education at the University of California, Berkeley, and a member of the National Academy of Education. He is the coauthor of Turtle Geometry: The Computer as a Medium for Exploring Mathematics (MIT Press, 1981). Daniel G. Bobrow is a Research Fellow in the Intelligent Systems Laboratory, Xerox Palo Alto Research Center, editor-in-chief of the Journal of Artificial Intelligence, and Chair of the Governing Board of the Cognitive Science Society. Michael Brady is Senior Research Scientist at MIT's Artifical Intelligence Laboratory. Patrick H. Winston is Professor of Electrical Engineering and Computer Science and Director of the Artificial Intelligence Laboratory at MIT.