#CelebrateWithDE – Pi Day

It’s time to celebrate the ratio of the circumference of a circle to its diameter, otherwise known as Pi. The infinite number is commonly shortened to 3.14 so mere humans can wrap their heads around it. We started giving Pi its due on 3/14/1988, the first national Pi Day, and have been eating pie and calculating ratios to celebrate every year since.

Featured Resource

Content Collection: Pi Day
Discovery Education Streaming
Grades K-2, 3-5, 6-8, 9-12, Assorted Resources

The annual celebration includes eating pies, throwing pies, and discussing the significance of the number in mathematical research and its everyday applications.

Active Learning

Being a mathematical constant, there is a certain amount of ‘just learning it’ to studying Pi, and these resources will help your students do that. But there are also fun and surprising ways to use Pi that incorporate other shapes. See some animations that show the constant in action in the last resource, below.

While they are watching the videos, explanation, and animation, help your students conceptualize Pi by using the strategy Concept Circles (Canadian Version) from our Spotlight on Strategies series. Using a circular graphic organizer for active note-taking and vocabulary development will highlight the connections between Pi, circles, and other shapes.

Standard Deviants Teaching Systems: Circles
(Canadian Version)
Discovery Education Streaming, Science Techbook, Social Studies Techbook, Math Techbook
Grades 3-5, Video Segment

Introduces circles and the formulas that relate to circles.
Circumference and Area of a Circle: Finding Radius and Diameter Given Area or Circumference
(Canadian Version)
Discovery Education Streaming, Math Techbook
Grades 6-8, Math Explanation

Uses the formulas for the area and circumference of a circle.
Pi (p)
Math Techbook
Grades 6-8, Animation

The value Pi is used to calculate the area and volume of circular objects. It is an irrational number.
Project Mathematics: The Story of Pi
(Canadian Version)
Discovery Education Streaming
Grades 6-8, Full Video

Although Pi is the ratio of circumference to diameter of a circle, it appears in many formulas that have nothing to do with circles. Animated sequences demonstrate Pi’s many applications.

Interested in joining classrooms around the world to Celebrate holidays year round? Check out our Timely Content Page for our Virtual Viewing Parties and more Instructional Strategies.


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One Comment;

  1. steven said:

    The number ? is a mathematical constant. Originally defined as the ratio of a circle’s circumference to its diameter, it now has various equivalent definitions and appears in many formulas in all areas of mathematics and physics.