Floor Circles From Pam Luckenbaugh, a sixth grade math teacher at Herbert Hoover Middle School in Edison, New Jersey: ìWhen teaching parts of a circle, pi, area and circumference, I use a tool we all have readily available...the floor! I use washable overhead markers and draw a large circle, which covers about 1/3 of my floor. I draw a perfect circle using a marker tied to a piece of string taped to the floor. I draw the diameter, a radius and a chord. My students ëwalkí each part as we define them. To understand pi, the students walk the diameter and the circumference of the circle and count their steps. Once we display the data on a chart, itís easy to see that the walk around the circle took about three times as many steps as the walk across the circle. I find that the kids donít forget what pi means since they literally walked it!î