Abstract
Build a personal collection by reproducing this “From the File” on card stock and adding it to From the File Treasury, a collection edited by Jean M. Show and packaged in a colorful plastic file box with room to add your own favorites (1991, stock no. 476, $21.50; 20% discount for individual members; see the NCTM Membership Application and Order Form in this issue). Readers are encouraged to send in two copies of their classroom-tested ideas for “From the File” to the Arithmetic Teacher for review.
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