Find the Area of a Polygon Using Multiplication

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Use prior experience with the array model of multiplication to teach young mathematicians how to find the area of rectangles in the first video of this four-part series. Multiple examples are presented that clearly demonstrate this process using visual models. A separate Guided Practice video offers an opportunity for young learners to demonstrate their understanding. Implement this resource to supplement whole-group instruction or assign as an independent learning activity to complement a lesson on area.

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CCSS: Designed
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Classroom Considerations

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  • Lesson begins by reviewing the definition of area and the array model of multiplication
  • Explains a common mistake for learners to avoid when finding the area of a polygon
  • Video is available as a slide show presentation

  • Additional practice problems are needed to support children with acquiring this new math skill
  • Assumes an understanding that area is measured with square units
Common Core