##### This *Informal Proofs of the Circumference/Area of a Circle* lesson plan also includes:

- Paper Plate Investigation Station
- UDL Checklist
- Rolling the Can Station
- Station Reflection Sheet
- Activity
- Graphic & Image
- Lesson Plan
- Project
- Vocabulary
- Join to access all included materials

Use this lesson plan to help your geometers develop informal proofs of the circumference and area of a circle. Working in small groups, learners rotate between three stations to complete hands-on activities that illustrate the relationships in the circumference and area formulas. The station activities include dissecting a paper plate, rolling a can to measure its circumference, and an exploration of relationships using an online circle tool applet. A reflection sheet is provided for each learner to record observations and information about each station's activity. The lesson concludes with learners using their notes to individually write an informal argument for the circumference and area of a circle.

##### Pros

- Lesson plan has detailed notes and is easy to follow
- Good use of hands-on activities
- Includes a good follow-up homework assignment

##### Cons

- Requires access to several laptops or tablets

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