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3rd Grade
​Week 2:  Area and Perimeter

Cover Page            Week 1            Week 2
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Investigations, Unit 5
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Math Expressions, Unit 6
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Sizing Up Measurement
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About Teaching Mathematics
burns_k-8_about-teaching-mathematics.pdf
File Size: 5553 kb
File Type: pdf
Download File

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CA Common Core Standards:  Measurement and Data
Geometric measurement: understand concepts of area and relate area to multiplication and to addition.
For more detail, go to the COVER PAGE for this unit.
​
THE WEEK AT-A-GLANCE
Day 1:  What Do You See? (from Sizing Up Measurement) *Rich Task*
Day 2:  Area of Rectilinear Figures (on grid): (ME Unit 6, Lesson 8) *Practice*
Day 3:  Solve Perimeter and Area Problems (Math Expressions, Unit 6, Lesson 9) *Practice*
Day 4:  Tangram Shapes and Area (Math Expressions, Unit 6, Lesson 10)  *Practice*
Day 5: Assessment - Let's discuss what you would like to use here, if anything at all.  You could pick problems from the ME assessment that are relevant or we could use items from the benchmark assessment.

Additional Practice:  Practice with Finding the Area and Perimeter of Rectilinear Figures (Jeremy’s Common Core Connections Homework Book – copy the practice and white out some of the dimensions) -You will have to ask Jeremy for this.  Someone should upload it so we have it in the future.



Day 1

Lesson:  What Do You See?
(from Sizing Up Measurement: Activities for Grades 3-5 Classrooms by Chris Confer - p. 65-68)

In this lesson each student creates a shape with an area of 30 square inches.  Together the class examines one shape and shares different ways to see the parts inside the shape, while the teacher uses numbers and equations to record each different way.  Then students write an equation showing how they see their won shape.  They exchange shapes and share their thinking.

Math Focus Points
Deconstruct rectilinear figures into smaller rectangles to find the area.

Formative Assessment
Collect student work.  Look for accuracy in writing the dimensions of each smaller rectangle and in finding the total area.
As you walk around, ask:  
  • About how many square inches do you predict your figure is?  How did you make your prediction?
  • How many square inches is your figure?  How do you know?
​Practice
Students can draw other rectilinear figures on the grid, then find the area and prove it with drawings and equations.
​Materials
Color Tiles
1 Inch Grid Paper (in the What Do You See pdf file provided)
what_do_you_see_.pdf
File Size: 1779 kb
File Type: pdf
Download File

GAME:  
Roll a Rectilinear Figure
(named in Jeremy's honor)
roll_a_rectilinear_figure.docx
File Size: 84 kb
File Type: docx
Download File

Comments, Photos, Videos . . .

 Additional Rich Task/Lessons:

1)  Foot Area and Perimeter (from About Teaching Mathematics) - Launch by reading How Big Is a Foot? 
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Click here for YouTube reading

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foot_area_and_perimeter.pdf
File Size: 50 kb
File Type: pdf
Download File

2)  Squaring Up
​(from About Teaching Mathematics)
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squaring_up.pdf
File Size: 48 kb
File Type: pdf
Download File

Math Workshop Items

Continue workshop items from week 1.

Day 2

Math Expressions, Unit 6, Lesson 8
​

​Area of Rectilinear Figures (TE p. 711-716)


In this lesson students find the area of a figure by decomposing it into smaller rectangles and adding the area of the rectangles.

Student Activity Book, p. 345-348

​Materials
Geoboards
Centimeter Dot Paper
​Student Activity Boook

SBAC Samples

Picture
sbac_rectilinear_q1.pdf
File Size: 37 kb
File Type: pdf
Download File

Picture
sbac_rectilinear_q2.pdf
File Size: 62 kb
File Type: pdf
Download File

Comments, Photos, Videos . . .

Math Workshop Items

 Math Expressions, Differentiated Instruction, p.715
​On-Level: Decomposing the Area, Activity Card 6-8
Picture
 Math Expressions, Differentiated Instruction, p.715
Challenge: Decomposing More than One Way Activity Card 6-8
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Day 3

Math Expressions, Unit 6, Lesson 9, TE p. 717-722

Solve Perimeter and Area Problems
 In this lesson, student solve world problems about area or perimeter.

Student Activity Book pages 349-352
​


Math Workshop Items

1) Continue to offer workshop items from any lessons prior to this.

2)  Measuring Perimeter:  Tape a variety of shapes on the carpet and have students work together to measure the perimeter.  They can use different measurement tools and chart the different measurements
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Day 4

Math Expressions, Unit 6, Lesson 10, TE 723-740

Tangram Shapes and Area
 In this lesson, students become familiar with tangram pieces and calculate area using tangram pieces.

​SAB p. 353-358

​Materials
Tangram pieces - borrow plastic tangrams from A124 or have students cutout from SAB 353A.

Math Workshop Items

Comments, Photos, Videos . . .

Day 5

Assessment - Let's discuss what we would like to use.

Comments, Photos, Videos . . .

  • Home
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