Category Archives: Uncategorized

Games with tanks and mirror books

Translated from this post by Jane Kats. In our childhood, there was a popular simple game: take a piece of paper, fold it in half and on one half of it draw a dozen small tanks (*translator’s note: drawing balloons … Continue reading

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Fibonacci Trees

For two weeks in a row, in our joint 1st-5th grade math classes, a certain famous sequence made its appearance.  The activities were seemingly very different: in the first one we were climbing stairs one or two steps at a … Continue reading

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Why not count on our fingers?

Translated from this post by Jane Kats. I would love to know the source of the very prevalent idea that counting on your fingers is bad. Our school is currently teaching counting and basic arithmetic using a ruler, i.e., a … Continue reading

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Time, symmetry, and unexpected turns

This is a story of how a kindergarten lesson on telling time turned into a lesson on symmetry.  It all started with a fun, colorful clock, with numbers 1 through 12 made out of shapes (some related to the number, … Continue reading

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The Piaget Phenomenon

I am very excited to let you know that I am now collaborating with the amazing Jane Kats and that translations of her insightful and inspirational posts will now regularly appear on my blog under the tag “Jane Kats”.  Among … Continue reading

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Four colors or more?

When you find your students working during break time on a problem that was the topic of a lesson three weeks prior, you know that something has gone right and your heart is filled with joy and excitement. What they … Continue reading

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Double perfect squares

We have recently done a unit on perfect squares in school. The following conversation with Katie (8yo) happened completely spontaneously on a peaceful, evening ride home. K: 10,000 is a double perfect square. Me: What do you mean? K: Well, … Continue reading

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