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# Show What You Know About Perimeter, Area, and Surface Area

Lesson 11 of 19

## Objective: SWBAT: • Show what you know about area, perimeter, surface area, and nets.

## Big Idea: How can you find the perimeter and area of various polygons? What is surface area and how can you calculate it? What do students understand? What gaps do they have in their understanding? Students review and take the quiz.

*50 minutes*

#### Do Now

*10 min*

See my **Do Now** in my Strategy folder that explains my beginning of class routines.

Often, I create do nows that have problems that connect to the task that students will be working on that day. Today I want students to review finding surface area. I want students to realize that this net creates a triangular prism. If students choose (i), they only found the area of the rectangles and left out the triangles. If students choose (i) they only included the area of one of the triangles. If students choose (iv) they found the area of the triangles by multiplying the base times the height.

As I walk around, I look to see which incorrect answer is most common among my students. I declare that this response is correct and I explain why. Students participate in a **Think Pair Share. **I call on students to say whether they agree or disagree with me and why. Students are participating in **MP3: Construct viable arguments and critique the reasoning of others.**

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#### Quiz

*25 min*

I give students the **Quiz.** Students engage with **MP1: Make sense of problems and persevere in solving them **and** MP6: Attend to precision**. If students do not finish in the allotted time, they set up a time (preferably that day) to come in and complete it. I use this data to inform my instruction. If students struggle with a concept, I will spiral it into do nows and homework assignments. I may also add a few problems on that topic to the next quiz.

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#### Geometry Games

*15 min*

When students finish completing and review their quiz they pick up a laptop. They can choose from the three games in their packet.

#### Resources

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- UNIT 1: Intro to 6th Grade Math & Number Characteristics
- UNIT 2: The College Project - Working with Decimals
- UNIT 3: Integers and Rational Numbers
- UNIT 4: Fraction Operations
- UNIT 5: Proportional Reasoning: Ratios and Rates
- UNIT 6: Expressions, Equations, & Inequalities
- UNIT 7: Geometry
- UNIT 8: Geometry
- UNIT 9: Statistics
- UNIT 10: Review Unit

- LESSON 1: Unit 7 Pretest
- LESSON 2: Perimeter vs. Area
- LESSON 3: Area of Triangles
- LESSON 4: Area of Composite Shapes
- LESSON 5: Exploring Circumference
- LESSON 6: Area vs. Circumference
- LESSON 7: Area, Perimeter, and Circumference
- LESSON 8: Classifying 3D Figures
- LESSON 9: 3D Figures and Nets
- LESSON 10: Nets and Surface Area
- LESSON 11: Show What You Know About Perimeter, Area, and Surface Area
- LESSON 12: Unit Cubes and Volume
- LESSON 13: Filling and Measuring
- LESSON 14: Designing Boxes
- LESSON 15: Geometry Jeopardy
- LESSON 16: Unit Closure
- LESSON 17: Unit Test
- LESSON 18: Quadrilaterals and the Coordinate Plane
- LESSON 19: Covering and Filling: Surface Area and Volume of Rectangular Prisms