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"A college-level math text for serious mathematicians and fans of recreational mathematics. This book proves that turtle graphics is not just kid stuff." Popular Computing
"Reading this book with the help of a good graphics computer system, you are sure to discover new and interesting math... an excellent textbook or self-study guide." W. Lloyd Milligan , Byte
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 the Free 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).