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Lesson Planet
Showing is better than telling in a short demonstration video to find the area of a circle. The silent narrator transforms the circle, made from ball chain, into a triangle you can measure with a ruler, labeling quantities each step of the way for clarity.
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Concepts
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Instructional Ideas
- Provide pupils with ball chain and a ruler so they can do the proof themselves
Classroom Considerations
- The lack of verbal instructions may make the video hard to follow for auditory learners
- Students should have prior knowledge of circles, triangles, and related measurement terms
- This video is hosted on YouTube
Pros
- Tactile learners appreciate the opportunity to feel their way through a problem, which is sometimes difficult to orchestrate in a math class
- The content provides an alternate way of viewing and executing geometric proofs
Cons
- None