Pattern Block Symmetry

Est. Class Sessions: 2

Mathematical Standards

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

Standards for Mathematical Practice

MP7.: Look for and make use of structure.

Students explore the concept of line symmetry, a common aspect of many shapes. Students use pattern blocks to create a mirror image of a pattern block figure and play a game using pattern blocks to make symmetrical shapes.

Content in this Lesson

Composing shapes that have line symmetry [E7].
Composing and decomposing shapes.

Daily Practice and Problems S–V

S. Patterns

T. Fact Families: Groups A and B

U. Grandma Is Still Baking Cookies

V. 100 Chart Patterns

Materials for Students

		Daily Practice and Problems	Lesson	Homework	Assessment
Student Book	Student Activity Book	100 Chart Reference	Pattern Block Symmetry Pages 269–271 Is It Symmetrical Page 273		Pattern Block Symmetry Check-In: Questions 5–6 Page 271 My Pattern Block Shape Page 275
Teacher Resources	Teacher Guide - digital	DPP Item S DPP Item T DPP Item U DPP Item V		Home Practice Parts 4–5	DPP Item T Fact Familes: Groups A and B DPP Item V 100 Chart Patterns

Supplies for Students

paper folded in half and creased
either paint and a paintbrush or scissors
pattern blocks

Materials for the Teacher

Display of the Trapezoid Man section of Pattern Block Symmetry (Student Activity Book) Page 269
Display of Is It Symmetrical (Student Activity Book) Page 273
Copies of Is It Symmetrical (Student Activity Book) Page 273. See Materials Preparation.
Unit 9 Assessment Record
Math Facts Class Record
Display set of pattern blocks
chart paper

Materials Preparation

Prepare Optional Targeted Practice. Place pattern blocks and a few copies of the Is It Symmetrical page from the Student Activity Book in a learning center to provide targeted practice with composing symmetrical shapes.

Assessment in this Lesson

Assessment	Expectation Assessed
Pattern Block Symmetry Check-In: Questions 5–6 Student Activity Book Page 271	E7. Compose shapes that have line symmetry.
My Pattern Block Shape Student Activity Book Page 275	E7. Compose shapes that have line symmetry.
DPP Item T Fact Families: Groups A and B Teacher Guide - digital	E12. Demonstrate fluency with the addition facts in Groups A and B. E13. Demonstrate the unknown numbers in an addition or subtraction sentence relating three whole numbers for the facts in Groups A and B.
DPP Item V 100 Chart Patterns Teacher Guide - digital	E1. Count forward and backward by ones, twos, fives, and tens. E6. Represent patterns using objects, pictures, number lines, 100 Chart, words, and symbols.

symmetrical
trapezoid

Unit 9

Unit Overview

Daily Practice and Problems

Lesson 1

Lesson 2

Lesson 3

Lesson 4

Lesson 5

Lesson 6

Lesson 7

Lesson 8

Lesson 9