CPALMS
Cpalms: Area of Rectangles: A More Efficient Way?
[Free Registration/Login Required] In this lesson, students will connect the concepts of counting each square unit and multiplying the side lengths to compute the area of a rectangle. They will extend this knowledge by computing a side...
Shodor Education Foundation
Shodor Interactivate: Lesson: Area
This lesson plan helps learners explore the mathematical concept of area and features resource links to further learning. CCSS.Math.Content.3.MD.C.7.a Find the area of a rectangle with whole-number side lengths by tiling it
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Area Builder
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