Author Archives: aofradkin

About aofradkin

I enjoy thinking about presenting mathematical concepts to young children in exciting and engaging ways.

Witnessing the woes of math homework

Every week, I spend several hours in the waiting area of a large gym where my kids take gymnastics lessons.  The room has several large tables where parents and siblings can do their work while waiting for their gymnasts. Many … Continue reading

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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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Highlights of 2017

2017 was a very exciting year for me. Here are some highlights in three categories. Teaching This has been my first full (calendar) year of teaching. The first words that come to mind when I think about teaching are “wonderful” … Continue reading

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Discovering the area of a trapezoid

Below is a guest post by Dmitry Bryazgin (originally written in Russian). Dmitry runs a small math circle near Princeton for students in grades 3-5. On the particular day described in the post, there were 4 students present. The main … Continue reading

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“Math you can play” – books with games

Games are an important part of the elementary school math curriculum that I develop and teach.  Through different games students learn and reinforce a variety of skills, ranging from arithmetic to spacial reasoning to logic. In my classroom, I have … Continue reading

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Isometric graph paper and 3D pictures

Translated from this post by Jane Kats. At our math festivals and during Mousematics lessons we actively use isometric graph paper, aka “triangular grid paper”.  Sheets with a triangular grid can be downloaded on our site here in the free downloads … Continue reading

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Fun with pentacubes

Today we started a unit on geometry with the second graders.  The first activity had them explore how many different structures can be made out of 4 snap cubes.  They very quickly came up with the five tetrominoes: After a … Continue reading

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