Lesson 6

3-D Shapes

Est. Class Sessions: 2
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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.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.
MP7.
Look for and make sense of structure.

Students search for everyday objects that represent cubes, spheres, cones, prisms, and pyramids. Student pairs select one 3-D shape and identify properties of that shape. During a class discussion, students report what they discovered about their shape and add it to a class chart about 3-D shapes.

Content in this Lesson

  • Exploring and identifying three-dimensional shapes in the real world
  • Describing and analyzing three-dimensional shapes using their properties [E2]
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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 Student Pairs

1 three-dimensional shape
1–2 self-adhesive notes, 3 × 5–inch

Materials for the Teacher

Display of 3-D Shape Hunt (Student Activity Book) Page 445
Display of Large 3-D Shapes Masters (Teacher Guide). See Materials Preparation.
Power Solids®, 2 sets
Unit 11 Assessment Record
chart paper
collection of 3-D shapes (everyday objects). See Materials Preparation.

Materials Preparation

Prepare for 3-D Shape Hunt. Prepare and gather examples of as many of the following three-dimensional shapes as you can find: cube, cylinder, sphere, cone, rectangular prism, square pyramid, triangular prism, and triangular pyramid. Some common examples of shapes are listed in Figure 1. The shapes are shown in Figure 2.

Figure 1
Figure 1: Everyday examples of 3-D shapes

Prepare a Box of Mystery Shapes. Before Part 2 of the lesson, place a variety of each of the 3-D shapes into a box (at least one shape for each student pair). Use the 3-D shapes in the sets of Power Solids® and some of the everyday examples of 3-D shapes that you used in 3-D Shape Hunt. Save your collection of 3-D shapes to use in subsequent lessons.

Prepare Chart for Display. Prepare a display of the Properties of 3-D Shapes chart shown in Figure 2. Glue pictures of each of the 3-D shapes from the Large 3-D Shapes Master in the “3-D Shape” column.

Figure 2
Figure 2: Chart for describing 3-D Shapes

Assessment in this Lesson

Assessment Expectation Assessed

Observe
3-D Shape Hunt
Student Activity Book
Page 445
E2.
Describe and analyze three-dimensional shapes using their properties (e.g., number and shape of sides, number of edges, and number of corners).

Observe
Guess My Shape
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).

DPP Item V
Problem Solving with Time
Teacher Guide - digital
E9.
Solve elapsed-time problems involving time measurements to the nearest minute.