selected publications
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article
- The Number Sense: How the Mind Creates Mathematics.. Mathematics Teacher. 9:638. 1998
- Symbols and Meanings in School Mathematics.. Mathematics Teacher. 89:782. 1996
- Review of Proofs without Words: Exercises in Visual Thinking, by Roger B. Nelsen.. Mathematics Teacher. 87:655. 1994
- Review of Elementary Algebra (2d ed.), by Jack Barker, James Rogers, and James Van Dyke.. Mathematics Teacher. 85:764. 1992