Tag Archives: multiplication

Games with the multiplication table

Posted on May 2, 2017 by aofradkin

The following was translated from this post by Jane Kats.  Translation and translator’s notes are by Yulia Shpilman. (Translator’s note: I taught a lesson inspired by this post to my math circle for 1st and 2nd graders on Sunday and … Continue reading →

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Double perfect squares

Posted on March 1, 2017 by aofradkin

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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Dots in a Square from Math Without Words

Posted on February 10, 2017 by aofradkin

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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Exploring Rectangles

Posted on September 17, 2016 by aofradkin

Friday is a special day in our math classes at the Main Line Classical Academy.  We read and discuss mathematical stories and we do exploration projects.  Here is the project that we did with the 2nd-4th grades last Friday. It … Continue reading →

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Napier’s Bones

Posted on April 2, 2015 by aofradkin

Recently, my husband was reading on Wikipedia about John Napier.  He became very intrigued with Napier’s bones, and decided to see whether we can acquire some.  I was very excited by the prospect as I have been lamenting about not … Continue reading →

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Fun With Multiplication?

Posted on February 12, 2015 by aofradkin

For the past few weeks in class, we have been exploring multiplication.  A few months ago, we had learned about and practiced skip counting, so this time around we started by discussing why this might not always be practical or … Continue reading →

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Chips for All Seasons

Posted on March 20, 2014 by aofradkin

Yesterday’s lesson with Katie and Varya consisted of exploring various ways of using colorful game chips for doing fun math.  The first activity involved dividing the chips between the doll Nina and the bear Stanford according to specified rules (I … Continue reading →

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Rectangular Numbers?

Posted on February 17, 2014 by aofradkin

A few days ago Katie and I played the following game: one of us would say a number and the other one would have to make a rectangle out of that many squares (actually we used the board and chips … Continue reading →

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Another lesson, another story: Counting outfits and classifying quadrilaterals

Posted on September 20, 2013 by aofradkin

This Wednesday’s lesson was a bit chaotic and unfortunately I do not have any pictures from it.  The girls were both hyper and cranky, and it was hard to keep their attention for more than five consecutive minutes; after that … Continue reading →

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