This is the best Middle School Probability outdoor exercise EVER!

# Equipment:

1 coin per student.

# Instructions:

In the schoolyard, students move back and forward with the flip of a coin. Must be a good flip. This exercise works best with a grid drawn on the schoolyard in chalk, perhaps. (See pic below) If possible film the exercise from above.

Now here are lots of people doing this 2D random Walk on Wall St. The results are totally amazing.

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**Watch for the Bell Curve. It’s AWESOME.**

This video was made by The National Museum of Mathematics NY.

Check out their Squared wheeled bike **here**.