The math lesson on variables began with a simple prompt.
As Dan Rothstein, executive director of the Right Question Institute, tells the story: “The teacher presented the following equation: 24 = (smiley face) + (smiley face) + (smiley face).” Then, she asked her students to think of as many questions as they could about the equation. What did the students want to know about this expression? What were they curious about?
The rules that she gave her students were simple, Rothstein says: (1) Ask as many questions as you can. (2) Do not stop to judge, discuss, or answer the questions. (3)...
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