Arithmetricks, Feb 1988, 101-105
Becoming a Mental Math Wizard, Sep 1994, 454
Dead Reckoning: Calculating without Instruments, Mar 1994, 212
Mathemagics: How to Look Like a Genius without Really Trying, Apr 1994, 295
Mental Math, Jan 1992, 78
More on Mental Computation, Mar 1986, 168-169
A Visual Approach to Algebra Concepts, Sep 1992, 434-437
Who Knows? Practical Math and Measures, Nov 1993, 696
