The Divisibility of xn – yn by x – y: A Constructive Example, Apr 1998, 342–45
Geoboard Quadrilaterals, Apr 1998, 288–90
The Incredible Three-by-Five Card! Feb 1996, 96–98 (see also Oct 1996, 576)
Mean Machines, Mar 1998, 266–68
Products, May 1999, 457
Sine Curves and Spaghetti, Oct 1998, 564–67
