> Presumably this person has no experience with 6 year olds? In case anyone is curious, this person has experience teaching children mathematics. For example,

> Presumably this person has no experience with 6 year olds? In case anyone is curious, this person has experience teaching children mathematics. For example, on his blog, we have http://jdh.hamkins.org/math-for-six-year-olds/ http://jdh.hamkins.org/math-for-six-year-olds/ http://jdh.hamkins.org/math-for-seven-year-olds-graph-coloring-chromatic-numbers-eulerian-paths/ http://jdh.hamkins.org/math-for-seven-year-olds-graph-colori... http://jdh.hamkins.org/math-for-eight-year-olds/ http://jdh.hamkins.org/math-for-eight-year-olds/ http://jdh.hamkins.org/math-for-nine-year-olds-fold-punch-cut/ http://jdh.hamkins.org/math-for-nine-year-olds-fold-punch-cu... The most recent post in his category "Math for Kids" is in fact teaching how to count ordinals up to omega-squared: http://jdh.hamkins.org/counting-to-infinity-poster/ http://jdh.hamkins.org/counting-to-infinity-poster/