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Hardcover | Out of Print | 498 pp. | 6 x 9 in | June 1981 | ISBN: 9780262010634
Paperback | $45.00 X | £37.95 | 498 pp. | 6 x 9 in | July 1986 | ISBN: 9780262510370
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Turtle Geometry

The Computer as a Medium for Exploring Mathematics


Turtle Geometry presents an innovative program of mathematical discovery that demonstrates how the effective use of personal computers can profoundly change the nature of a student's contact with mathematics. Using this book and a few simple computer programs, students can explore the properties of space by following an imaginary turtle across the screen. The concept of turtle geometry grew out of the Logo Group at MIT. Directed by Seymour Papert, author of Mindstorms, this group has done extensive work with preschool children, high school students and university undergraduates.

Harold Abelson is an associate professor in the Department of Electrical Engineering and Computer Science at MIT. Andrea diSessa is an associate professor in the Graduate School of Education, University of California, Berkeley.

About the Authors

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).


“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