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Recent Posts
 Witnessing the woes of math homework January 19, 2018
 The mathematical boundary between a joke and a lie January 15, 2018
 Highlights of 2017 December 31, 2017
 Discovering the area of a trapezoid December 29, 2017
 “Math you can play” – books with games December 17, 2017
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Author Archives: aofradkin
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
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
Posted in Uncategorized
Tagged #tmwyk, 5 years old, 9 years old, amusing conversation, philosophical
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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
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 35. On the particular day described in the post, there were 4 students present. The main … Continue reading
Posted in Uncategorized
Tagged 3rd grade, 4th grade, area, exploration, geometry, guest post
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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
Posted in Uncategorized
Tagged arithmetic, arithmetic games, books, games, resources, review
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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
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
Posted in Uncategorized
Tagged 2nd grade, 3Dgeometry, geometry, Main Line Classical Academy, manipulatives, snap cubes
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