This guide was designed to help teachers use a paint grid to teach students how to find perimeters with a model to solve word problems. The guide shares a weblink to a free digital manipulative, instructions for using the manipulative, suggested uses, example problems, extension ideas, and printable problems with answer keys.
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Common Core Standards Addressed:
CCSS.Math.Content.3.MD.D.8 Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.
CCSS.Math.Content.4.MD.A.3 Apply the area and perimeter formulas for rectangles in real world and mathematical problems. For example, find the width of a rectangular room given the area of the flooring and the length, by viewing the area formula as a multiplication equation with an unknown factor.
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