When my students grow too dependent on their calculators, I ask them to find a number that, when multiplied by itself, gives them 2. Students quickly see that since 1² = 1 and 2² = 4, the answer has ...
It’s surprisingly difficult to prove one of the most basic properties of a number: whether it can be written as a fraction. A broad new method can help settle this ancient question. In June 1978, the ...
Q: Our 10-year-old son has struggled with math at school and complains about it a lot at home. We worry that our daughter, a third-grader, is picking up from him the idea that math is hard and boring.
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