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 Dots in a Square from Math Without Words February 10, 2017
 Conservation of fingers and toes February 8, 2017
 Lots of fun with Tiny Polka Dot January 28, 2017
 Avoid Hard Work! – A book for problemsolvers of all levels (toddler to mathematician) January 11, 2017
 Functions in Kindergarten – A favorite January 6, 2017
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Tag Archives: sets
Family Regrouping
Two sisters, two parents, two cousins, and four grandparents, all met up at the park (true story). During the car ride home, one of the sisters (lets call her Katie), exclaimed, “There were ten of us at the park.” The … Continue reading
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Tagged #tmwyk, 6 years old, arithmetic, counting, games, sets, word math games
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A bit of Set Theory
Katie and I joined my sister’s Golden Key Russian School – Katie attends and I help out my sister with the math classes. We hope to write semidetailed descriptions of the lessons on the school’s blog, but here I will … Continue reading
Onetoone correspondence – Not always obvious to kids!
There are some very hard problems in combinatorics that involve showing that there is a bijection (onetoone correspondence) between two set of objects, thus showing that the two sets have the same number of elements. On the other hand, we … Continue reading