# CCSS.Math.Content.5.NF.A.2

Solve word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators, e.g., by using visual fraction models or equations to represent the problem. Use benchmark fractions and number sense of fractions to estimate mentally and assess the reasonableness of answers. For example, recognize an incorrect result 2/5 + 1/2 = 3/7, by observing that 3/7 < 1/2.

## 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...

## Equal Splitting Lesson Plan: Slice Fractions Game

Posted by SM Bruner on

In this lesson plan which is adaptable for grades 2-5, students use BrainPOP resources (including an online game) to explore equal parts, equal splitting, fractions, equivalent fractions, and other ma...

## Ratios Lesson Plan: Ratio Rumble Game

Posted by SM Bruner on

In this ratios lesson plan, which is adaptable for grades 3-8, students explore ratios and proportions using an online math game called Ratio Rumble. Students will identify ratios when used in a varie...

## Adding and Subtracting Unlike Fractions Lesson Plan: Check The Denominator!

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In this lesson plan adaptable for grades 3-8, students use BrainPOP to learn how to identify the lowest common denominator in equations, and add and subtract unlike fractions. They’ll also explain in ...

## 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...