Wednesday, March 12, 2014

Since it’s Pi day on Friday, I had students measure the diameters and circumferences of several circular objects in our classroom to see exactly what pi is and where it comes from. It’s amazing to see 7th graders, who have used pi for several years to make calculations, know that its decimal approximation is 3.14 but have no idea where that number comes from. The sounds of “ooooh,” after seeing that it’s the ratio of the circumference to diameter of a circle was great. Taking the mystery out of math, one concept at a time.

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