Author Archives: aofradkin

About aofradkin

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

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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Funville Adventures launched!

Funville Adventures, our math-inspired fantasy adventure with Allison Bishop, is officially published! It is available on amazon and directly from Natural Math, where you can read more about the book. Here are some early reviews of the book: “You too … Continue reading

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Counting crocodile legs

Katie, at nine years old, rarely asks me to give her math problems.  She always has a lot on her mind and gets plenty of problems from school and other math-related activities (interesting problems do sometimes come up spontaneously in … Continue reading

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Counting beads

Translated from this post by Jane Kats. Recently, at our math lessons with 5-6 year olds, we were … threading beads. Actually, we were making very simple abacuses. We were putting 5 light beads and 5 dark beads on a … Continue reading

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