Find a missing side length for a figure when given the perimeter. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

I can create polygons and find the perimeter by using the unit squares on my paper

Create shapes using colorful blocks, and explore the relationship between perimeter and area. CCSS.Math.Content.3.MD.C.7.a Find the area of a rectangle with whole-number side lengths by tiling it

Eighth graders are given various dimensions of a trapezoid and are asked to find its area. This requires them to use the Pythagorean Theorem and to decompose the trapezoid into other polygons. Aligns with 8.G.B.7.

In this task, 6th graders must inches to feet in order to find the area of a rectangular board and explain the error in the calculations made by the board owner. Aligns with 6.RP.A.3.

Sixth graders apply what they know about area of other polygons to develop a formula for finding the area of a triangle.