Lesson 9

Sorting 3-D Shapes

Est. Class Sessions: 2–3
X

Mathematical Standards

3.G.A
Reason with shapes and their attributes. (3.G.A.1)

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 analyze the properties of three-dimensional shapes to make a chart and play a game. Then students sort 3-D shapes by their properties and write geometric riddles based on the properties of the three-dimensional shapes.

Content in this Lesson

  • Describing and analyzing three-dimensional shapes using their properties [E2].
  • Classifying 3-dimensional shapes using their properties [E4].
  • Justifying conclusions using geometric properties [E7].
  • Using geometric concepts to solve a problem.
X

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

folded sheet of paper
scratch paper
scissors
glue

Materials for the Teacher

Unit 11 Assessment Record
Math Facts Class Record
Unit 11 Individual Assessment Record
2 sets of Power Solids®
5 sets of 3-D Shape Sort Cards from Lesson 7. See Materials Preparation.
Display of Properties of 3-D Shapes chart from Lesson 6
Display of Edges, Vertices, and Faces chart from Lesson 7
Display set of 3-D Shape Sort Cards Master from Lesson 7 (Teacher Guide) See Materials Preparation.
Display set of Large 3-D Shapes Master from Lesson 6 (Teacher Guide) See Materials Preparation.
chart paper

Materials Preparation

Prepare to Display Shape Finder Chart. Prepare and display chart paper for the Shape Finder game in Part 1. Title the chart “Shape Finder” and make a table with two columns. Label one column “Property” and the other “Possible Shapes.” See Figure 1. Copy and cut apart five sets of the 3-D Shape Sort Cards Master to attach to the chart.

Figure 1
Figure 1: Shape Finder chart

Prepare for Guess My Shape. Make a display set of the cards on the 3-D Shape Sort Cards Master in Lesson 7 of the Teacher Guide on card stock and cut apart the cards. Have each student pair remove the 3-D Shape Sort Cards page in the Student Activity Book. Ask one student to cut apart the cards to make a stack of cards and ask the other student to keep the page intact so it can be used as a reference.

TIMS Tip

Students will need the 3-D Shape Sort Cards for the Mystery Sort activity. After students play Guess My Shape, ask the remaining students to cut apart their cards and write their initials on the back of each card. Store the cards in envelopes or plastic bags. In case students misplace their cards, make extra copies of the 3-D Shape Sort Cards Master from the Teacher Guide. Display the Shape Finder Chart in the classroom so that students can refer to the chart throughout this lesson.

Prepare a Sample Geometry Riddle. Write one or two sample riddles. For example, a riddle for a rectangular prism could have the following clues: My shape has 6 rectangular faces that are parallel and congruent. It has 12 edges and 8 vertices. All the vertices have right angles. What is it? For demonstration purposes, show how to display the riddle on the front of a sheet of paper folded in half with a picture of the solution on the inside of the paper.

Prepare the Mystery Sort Game for a Learning Center. Prepare a few copies of the Mystery Sort: 3-D Shapes Master for targeted practice. Cut apart the properties and the “Yes” and “No” cards and place them in an envelope along with a copy of the directions, a set of the prepared Faces of 3-D Shapes Cards Masters, or other representation of 3-D shapes.

Assessment in this Lesson

Assessment Expectation Assessed Math Practices Expectation Assessed

Observe
Mystery Sort: 3-D Shapes
Student Activity Book
Page 461
E2.
Describe and analyze three-dimensional shapes using their properties (e.g., number and shape of sides, number of edges, and number of corners).
E4.
Classify 2- and 3-dimensional shapes using their properties.
E7.
Justify conclusions using geometric properties.

Sorting 3-D Shapes
Check-In: Questions 2–3
Student Guide
Page 322
with corresponding
Feedback Box
Teacher Guide - digital
E2.
Describe and analyze three-dimensional shapes using their properties (e.g., number and shape of sides, number of edges, and number of corners).
E4.
Classify 2- and 3-dimensional shapes using their properties.
E7.
Justify conclusions using geometric properties.
MPE1.
Know the problem. I read the problem carefully. I know the questions to answer and what information is important.
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.

DPP Item GG
Fact Family Quiz: 9s
Teacher Guide - digital
E12.
Determine the unknown number in multiplication and division sentences relating three whole numbers for the nines.