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A few writers this issue make a point of not letting the tool do the thinking. Todd Moyer walks an Algebra 2 class through the Simplex Method by hand, partly so students stop believing the calculator’s “rref” button can reduce any matrix. Mackenzie Wall takes the opposite tack on motivation: rather than talk students into caring about statistics, she hands them data on whether wealth shapes quality of life and lets the question pull them in. Both ask students to do work the easy path would skip.

The rest leans on objects you can hold. Marsha Nicol Guntharp, Fred Browning, and Gloria Royle videotape toy ball poppers and track the flight in TI-Nspire to put projectile motion in front of algebra and calculus students; Amanda Mickus maps the seven pieces of the Soma cube onto Common Core standards across grade levels. And Bob Kinner finally answers “Mike’s Problem,” posed in these pages back in Spring 2001. Fifteen years is a long wait for a solution.


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