Activities: Interpreting Proportional Relationships, Sep 1989, 445-452
Activities: Proportional Relationships and Unit Rates, Oct 1989, 537-544
Applications: Gears, Ratios, and the Bicycle, Sep 1989, 466-468
Arithmetic, Feb 1989, 145
Connecting Research to Teaching: Proportional Reasoning, May 1993, 404-407
HiMap, Module 15, A Uniform Approach to Rate and Ratio Problems: The Introduction of the Universal Rate Formula, Nov 1990, 682
The Mathematics Achievement Product, Oct 1992, 587-588
Plane Geometry: Proportions in Geometry, Sep 1990, 478
The Power of Proportions in Problem Solving, Jan 1989, 11-13
Programmed Math Series: Percent, Proportion, Ratio, Whole Numbers, Decimals, Fractions, Nov 1987, 688-689
Proportion-Problem Solution, Mar 1995, 244
Proportions and Percents, May 1986, 393-394
Ratio and Proportion in Mathematical Modeling, Feb 1989, 149
Sci-Math, May 1988, 408
