A History of Pi by Peter Beckman
A History of Pi by Peter Beckman
Hardbound book about the history of that mathematical expression Pi and its importance.  The dust cover and book have small tears on the bottom of the back binding. ISBN 0-8802-9418-3
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Counting Beans
Counting Beans
Counting beans are white on one side and red on the other. ¬†Great for counting, creating groups and creating patterns.  
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