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Spinning Blackboard
Source Institutions
Create beautiful spirals by drawing a straight line. This sounds crazy, but you can with a turntable (a record player or lazy susan), paper, and pen.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-972.jpg?itok=SoYgYOV7)
Pi Toss
Source Institutions
In this activity, learners explore a surprising method for calculating the mathematical constant pi, known as Buffon's Needle.
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Non-Round Rollers
Source Institutions
Wheels aren't the only things that can "roll" objects that are placed on top of it. Make non-intuitive shapes from cutouts and a compass to demonstrate this.
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Radioactive-Decay Model: Substitute coins for radiation
Source Institutions
Get a roll of pennies, throw them on the ground, then remove those that only show tails, and repeat with the ones left over.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-969.jpg?itok=NjFz0vwB)
Cutting Pi
Source Institutions
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.