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

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## Objective

SWBAT: â¢ 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.

## Do Now

10 minutes

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.

## Quiz

25 minutes

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.

## Geometry Games

15 minutes

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