Archived Information
Mary Lewis Sivertsen
U.S. Department of Education
Richard W. Riley
Secretary
Office of Educational Research and Improvement
Sharon P. Robinson
Assistant Secretary
Office of Research
Joseph C. Conaty
Acting Director
September 1993
Ordering Information
This publication will be sold in bulk at the U.S. Government Printing Office. For further information, call their Order Desk at 202/783-3238. The GPO stock number for this book is 065-000-00599-9. For single copies, please write to U.S. Department of Education, 555 New Jersey Avenue NW, Washington, DC 20208-5641.
The illustrations in this booklet, taken together, represent a transformation of four congruent shapes rotating about fixed points in ten increments to create a new and unified shape.
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