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In this activity, learners explore a surprising method for calculating the mathematical constant pi, known as Buffon's Needle.

Get a roll of pennies, throw them on the ground, then remove those that only show tails, and repeat with the ones left over.

In this activity, learners use a string and pair of scissors to find pi in the world all around them. Take the circumference of a round object with string and cut the string to that length.