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Standard: 3.MD.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.

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Students will use Microsoft OneNote to define polygon, perimeter, and area. They will draw pictures to accompany each definition. For example, they will be asked to draw a polygon, draw another polygon and circle its perimeter, and draw another polygon and shade in its area.

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Students will use Airtable to create two checklists that outline the steps needed to:
1. Find the perimeter of a polygon, given its side lengths and
2. Find an unknown side length of a polygon, given its perimeter.

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Students will use IPEVO Whiteboard to take a picture of a polygon-shaped object in the classroom (e.g., a book, a desk, a poster on the wall, the board), and annotate the object’s perimeter in the app after taking an in-person measurement.

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Students will use Popplet to categorize and sort rectangles with the same perimeter but different area and rectangles with the same area but different perimeter.

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Students will use Adobe Spark Page to use images of polygons to defend their reasoning about why some shapes have the same perimeter as their area (such as a 6x3 rectangle) and some do not (such as a 5x5 square).

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Students will use Animation Desk to draw a series of objects to include in a presentation about the objects’ perimeters. The objects must be polygons and the students will be asked to create their own perimeter problems based on the images for their peers to solve.