Tag Archives: 9 years old

The mathematical boundary between a joke and a lie

Like all siblings, my children occasionally quarrel. I generally try not to get involved unless it gets loud or one of them complains to me. Sometimes, however, I hear something that amuses me and I tune in or even join … Continue reading

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Dots in a Square from Math Without Words

Recently, my third grade class and I have fallen in love with Math Without Words by James Tanton. This is a delightful collection of math puzzles, ranging in difficulty from fairly easy to quite hard, but all mathematically beautiful. Occasionally, … Continue reading

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