Reflection: Station Rotation What's Going On in That Area - Section 1: Don't Be a Square



Because students were having such a blast finding the area, I ask them to generate and discuss advantages and disadvantages of various formulas for the perimeter length of a rectangle that is l units by w units. Since one of the key components explained by Common Core is that students are able to construct viable arguments and critique the learning of others.  I wanted my students to view finding the area in various ways.  For instance,  P = 2l + 2w has two multiplications and one addition, but P = 2(l + w), which has one addition and one multiplication, involves fewer calculations. So, I give them about 15 minutes or so to discuss, create, and examine the use of formulas.

  What I noticed!
  Station Rotation: What I noticed!
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What's Going On in That Area

Unit 5: All About the Metric System!
Lesson 5 of 6

Objective: 4.MD.3 SWBAT apply the area and perimeter formulas for rectangles in real world and mathematical problems.

Big Idea: Students often confuse the terms area and perimeter. In this lesson, students will find the area of figures by counting rows and column and multiplying.

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Math, partnership, Construction, reasoning, discussions
  80 minutes
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