Lesson 6

Walking Around Shapes

Est. Class Sessions: 3
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Mathematical Standards

3.OA.A
Represent and solve problems involving multiplication and division. (3.OA.A.1, 3.OA.A.2, 3.OA.A.3)
3.OA.B
Understand properties of multiplication and the relationship between multiplication and division. (3.OA.B.5)
3.OA.C
Multiply and divide within 100. (3.OA.C.7)
3.OA.D
Solve problems involving the four operations, and identify and explain patterns in arithmetic. (3.OA.D.9)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in solving them.
MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.
MP7.
Look for and make sense of structure.

Students discuss the difference between regular and irregular shapes. They measure regular shapes to the nearest centimeter and then look for the relationship between side length and perimeter. A variety of tools and strategies are used to solve perimeter problems including making point graphs, using mental math to multiply and divide, and using patterns in data tables, graphs, and number sentences.

Content in this Lesson

  • Identifying regular and irregular polygons including triangles, rectangles, and hexagons.
  • Finding the perimeter of regular polygons.
  • Identifying and extending multiplicative patterns in graphs and tables [E1].
  • Representing multiplicative patterns in graphs and tables [E2].
  • Multiplying and dividing using mental math strategies [E3].
  • Representing solution strategies for problems involving multiplication [E4].
  • Representing solution strategies for problems involving division [E5].
  • Making point graphs to model real-world situations [E6].
  • Reading a table or point graph to find information about a data set [E7].
  • Measuring to the nearest whole centimeter [E8].
  • Checking work for accuracy with a second method [MPE3].
  • Communicating solution strategies [MPE5].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

centimeter ruler

Materials for the Teacher

Display of Walking Around Shapes Practice Menu (Student Activity Book) Page 399
Displays of Collection of Shapes 1–3 Masters (Teacher Guide)
Display of second page of Walking Around Shapes (Student Guide) Page 295
Display of Centimeter Graph Paper Master (Teacher Guide)
Unit 10 Assessment Record

Materials Preparation

Prepare Digit Cards. Make a set of Digit Cards 0–9 using index cards, a deck of playing cards, or the Digit Cards 0–9 Masters. If using playing cards, the ace can stand for 1 and a face or joker card can stand for zero. These cards will be used in DPP item T.

Prepare Assessment Master. Copy the data table on a different page than the graph shown on the Professor Peabody's Shapes Data Masters. Students need to see these pages side by side.

Assessment in this Lesson

Assessment Expectation Assessed Math Practices Expectation Assessed

Walking Around Shapes Practice Menu
Self-Check
Student Activity Book
Page 399
E6.
Make a point graph to model real-world situations.
E7.
Read a table or point graph to find information about a data set.

Perimeter Page
Student Activity Book
Page 400
E8.
Measure to the nearest centimeter.

Walking Around Hexagons
with Feedback Box
Student Activity Book
Pages 409–412
E1.
Identify and extend multiplicative patterns represented in graphs, tables, and number lines.
E2.
Represent multiplicative patterns in tables, graphs, and number lines.
E3.
Multiply and divide using mental math strategies.
E4.
Represent solution strategies for problems involving multipliction.
E5.
Represent solution strategies for problems involving division including interpreting remainders.
E6.
Make a point graph to model real-world situations.
E7.
Read a table or point graph to find information about a data set.
E8.
Measure to the nearest centimeter.
MPE3.
Check for reasonableness. I look back at my solution to see if my answer makes sense. If it does not, I try again.
MPE5.
Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.

Professor Peabody's Shapes Data
Assessment Master
Teacher Guide - digital
E1.
Identify and extend multiplicative patterns represented in graphs, tables, and number lines.
E2.
Represent multiplicative patterns in tables, graphs, and number lines.
E3.
Multiply and divide using mental math strategies.
E4.
Represent solution strategies for problems involving multiplication.
E5.
Represent solution strategies for problems involving division including interpreting remainders.
E7.
Read a table or point graph to find information about a data set.