Lesson 8

Getting to Know Shapes

Est. Class Sessions: 1
X

Mathematical Standards

2.G.A
Reason with shapes and their attributes. (2.G.A.1)

Standards for Mathematical Practice

MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP5.
Use appropriate tools strategically.
MP7.
Look for and make use of structure.

Students use straws and chenille sticks to build proportional models of the pattern blocks. Constructing models of pattern block shapes helps students identify and describe shapes by their properties.

Content in this Lesson

  • Constructing proportional models (skeletal outlines) of the pattern block shapes.
  • Identifying, describing, and sorting pattern block shapes based on their attributes (e.g., number of sides, number of angles) [E1].

Daily Practice and Problems W–X

W. Riddle

X. Number Sentences

X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

pattern block set (4 yellow hexagons, 24 green triangles, 16 brown trapezoids, 12 blue rhombuses, 8 red trapezoids,     5 orange squares, 12 purple triangles, 8 tan rhombuses). See Materials Preparation.

Supplies for Student Pairs

30 straws all the same length. See Materials Preparation.
30 two-inch connectors (made from chenille sticks or paper clips). See Materials Preparation.
6 self-adhesive notes

Materials for the Teacher

Display of What Makes a Shape a Polygon Master (Teacher Guide)
Unit 13 Assessment Record
Display set of pattern blocks (yellow hexagon, green triangle, blue rhombus, red trapezoid, orange square, tan rhombus)
scissors
3 straws
3 two-inch connectors (made from chenille sticks or paper clips)

Materials Preparation

Gather Straws and Prepare Connectors. Each student pair will need 30 straws and 30 2-inch connectors. Gather straws of the same length. Cut chenille sticks into 2-inch sections or use bent paper clips as shown in Figure 3.

image

Figure 3: Using a paper clip as a connector

TIMS Tip

If the straws are very long, you may choose to cut them in half. This will make the sizes of the models more manageable.

Prepare Pattern Block Sets. Add pattern blocks to pattern block sets from Lesson 2. Add 5 orange squares, 12 purple triangles, and 8 tan rhombuses to each student's set. This will be the set you will use for the remainder of the lessons in this unit. Organize pattern blocks into sets and place each set into a resealable plastic bag.

Assessment in this Lesson

Assessment Expectation Assessed
Think about Shapes
with Feedback Box
Student Activity Book
Pages 689–690
E1. 
Identify, describe, sort, and draw 2-dimensional shapes based on their attributes (e.g., square corners, number of sides, number of angles, number of parallel sides).