Read the movie description that appears below the movie player on the Pi Topic Page. Then use the following prompts to encourage class discussion before, during, and after watching the movie.


  • What do you know about pi?
  • How and why do we use pi? ?
  • Why are symbols like pi helpful?

During (Pause Points)

Stop at the following times in the movie and ask questions or prompt a discussion to keep students focused and to assess their understanding before moving on:

  • Timecode :28: What is the difference between a circumference and a diameter?
  • Timecode 1:20: What’s one reason can’t pi be written as a fraction?
  • Timecode 2:20: Why does 2 x 3.14 x 6 give a less accurate measure of this circle’s circumference than 12 pi?


  • How could you use pi when calculating with squares? With spheres?
  • What professionals might use pi in their work?


Lesson Plan Common Core State Standards Alignments