# CCSS.Math.Content.3.MD.C.7c

Use tiling to show in a concrete case that the area of a rectangle with whole-number side lengths a and b + c is the sum of a × b and a × c. Use area models to represent the distributive property in mathematical reasoning.

## Scaling Shapes Lesson Plan: PhET Interactive Simulations

Posted by jglassman on

In this lesson plan, students use an interactive simulation to predict the area and perimeter of shapes that have been scaled by factors of 2 or 3. Then they’ll generalize how the area and perimeter o...

## What’s My Area Lesson Plan: PhET Area Builder Simulation

Posted by jglassman on

In this lesson plan, students use an interactive simulation to investigate the mathematical science of area and the different ways to calculate and find area. Area is defined as the amount of space a ...

## Area Builder Lesson Plan: PhET Interactive Simulations

Posted by jglassman on

In this lesson plan, students use an interactive simulation called Area Builder to figure out the area of a rectangle with fractional side lengths. Then they multiply fractional side lengths to discov...

## Math Skills Lesson Plan: It’s All Fun and Games

Posted by SM Bruner on

In this math skills lesson plan, which is adaptable for grades 3-12, students work collaboratively to research selected math skills. Students then create, play, and assess a math game that is designed...