LESSON 12OBJECTIVE: MEASURE TO FIND THE AREA OF RECTANGLES WITH FRACTIONAL SIDE LENGTHS

By the end of the lesson you will be able to…

5th Grade Module 5Lesson 12K. Clauson

Multiplying FractionsUse Interwrite Tools

Finding the VolumeV = ____ units x ____ units x ____ units

How many layers of 10 cubes are in the prism?

How many layers of 8 cubes are there?

How many layers of 20 cubes are there?

Application ProblemMargo is designing a label. The dimensions of the label are 3 ½ inches by 1 ¼ inches. What is the area of the label? Use the RDW process.

Let’s draw out what this problem is saying!

** Change fraction in student packet!

Application Problem ~ ANSWER!Margo is designing a label. The dimensions of the label are 3 ½ inches by 1 ¼ inches. What is the area of the label? Use the RDW process.

Teacher notes

Students will need:

* Problem Set

* Rulers

Concept Development

In today’s lesson…

We will use our Problem Set to find the areas of more mystery rectangles. Today we will use a ruler to help us find the area. We will use the inch side of the ruler!

How do you think a ruler might be useful in finding the area of a rectangle?

Teacher- now switch to using Problem Set on Internet and Interwrite tools for the rest of the lesson

5th Grade Module 5- Lesson 12K. Clauson

LET’S DEBRIEF• Take 2 minutes to check your answers with your partner.• Let’s share any insights you had while solving these problems.

• Look back in the area model we did together in Problem 1b. How many squares do you see in your area model? What patterns do you see whenever you have an area model of a square?

• What is the relationship between Problem 1e and 1f?• Using mental math, how can you find ½ times any fraction?

5th Grade Module 5– Lesson 12K. Clauson

EXITTICKETLESSON 12