Tennis Balls in a Can

Make your classroom interesting by teaching or assessing through tasks. Deepen the understanding of Geometry and motivate young mathematicians. The task uses investigation with tennis balls and their container to prompt learners to use critical thinking skills.

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CCSS: Designed
Instructional Ideas

  • Have a model or real tennis balls and container to help with the visual effect
  • Learners can work in groups to complete the task
  • Allow students to use drawing materials to create picture models
Classroom Considerations

  • Understanding/review of the volume formula for a sphere is needed
  • Discuss Cavalieri's Principle and the Pythagorean Theorem

  • Task oriented 
  • Answers/description provided
  • Interesting topic

  • Lack of visuals in the task
  • Plenty of verbal descriptions for the students
Common Core