publication venue for
- Understanding Calculus, Second Edition (Book Review). 97:382. 2004
- How reform secondary mathematics texts stack up against NCTM's principles & standards. 94:540-545,589. 2001
- African Fractals: Modern Computing and Indigenous Design (Book Review). 93:160-161. 2000
- The Role of History in a Mathematics Class.. 93:704-706. 2000
- The Number Sense: How the Mind Creates Mathematics.. 9:638. 1998
- Symbols and Meanings in School Mathematics.. 89:782. 1996
- Review of Proofs without Words: Exercises in Visual Thinking, by Roger B. Nelsen.. 87:655. 1994
- Review of Elementary Algebra (2d ed.), by Jack Barker, James Rogers, and James Van Dyke.. 85:764. 1992
- Teaching Discrete Mathematics in Grades 7-12.. 83:362-367. 1990
- Logic for Algebra: New Logic for Old Geometry.. 78:457-64. 1985
- Systematic experimentation: A frequently used problem-solving strategy.. 77:171-176. 1984
- Motivating Students to Make Conjectures and Proofs in Secondary School Geometry. 75:447-451. 1982
- A Preservice Institute for teachers of Secondary Mathematics.. 65:371-373. 1972
- Applied measurement- using problem solving.. 78:176-180.
- Centroid of a Polygon--Three Views. 94:302-307.
- Discovery of Formulas Through Patterns. 66:337-338.
- Fixed point theorems in Euclidean geometry.. 66:324-330.
- Phonograph Records and Adding Machine Paper. 73:258-261.
- The Second National Assessment in Mathematics: Area and Volume. 74:704-708.