Math Teachers at Play #10

Math Teachers at Play #10 is now up at Homeschool Math Blog.

I think my favorite part is the paper folding thought experiment, followed closely by How I Taught My Mother Binary Numbers. Come to think of it, the paper folding is at heart an example of the power of binary numbers.

P.S. I'll be hosting the next Math Teachers at Play, #11, on Friday, July 10.