Category: Geometry

Mobius Strip Puzzles and a Mathematical Proof

September 15, 2023 Leave a comment

Mobius strips are easy to make. Just glue one end of a strip of paper to the back side of the other end. Then you have a twisted strip. Lots of knitters make Mobius cowls as well. It’s a popular and cozy style. The author of some of the books I’ve used with students, mathematician […]

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Fun With Blocks: Foundational Geometry

September 1, 2012 Leave a comment

In the course of my teaching and tutoring experience, I’ve come across the fact that Americans often fall short of others in geometry1,2. Besides the fact of test scores, I see that in how difficult it is for bright high school students I tutor to grasp certain spatial concepts. In fact, I was recently tutoring […]

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