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Wednesday, November 28, 2018

Logarithms: How Math Helps Science

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I'm teaching my algebra students about logarithms today. It is likely the hardest algebra topic there is. When I started at Contra Co...
Saturday, September 8, 2018

Geometric Construction of the Regular Pentagon

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I never particularly enjoyed geometric constructions when I was younger. It may be because I had a tendency to press down too hard, and m...
Sunday, July 1, 2018

Math Teachers at Play #118

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In two more months, we'll hit MTAP #120, which should be the ten-year anniversary mark. Is it? The number 118 ... ... factors to ...
Sunday, January 7, 2018

Logic Puzzle - What Does Your Friend See?

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I love logic puzzles, and was drawn by the title saying this was a hard one . Usually Nautilus is well-written, but their version of th...
Sunday, December 31, 2017

Arithmetic, by Paul Lockhart

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This book is part history and part philosophy of arithmetic. He also includes a few exercises in italics (one every few pages). ...
Saturday, November 4, 2017

Re-reading Archimedes Codex

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I am re-reading The Archimedes Codex. It is fabulous. A detective story of history, science, and math. (I wrote my first review of it two y...
Monday, August 14, 2017

First Day, Again

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First day of classes. I was not as excited as usual. But I had my prep done, and once I got in the classroom, I loved it like always. 25 ...
Friday, June 30, 2017

Math Teachers at Play #109 (a blog carnival)

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Who is 109?      109 is a twin prime, twinned with 107.    (from numbergossip.com) If 109 is written in Roman notation (CIX), then it...
Tuesday, June 6, 2017

What I learned at CAP's Community of Practice

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CAP is California Acceleration Project . Check out their publications . The first time I attended one of their conferences, I struggled with...