## Symmetry Game

In this lesson, children will pair up and use pattern blocks to copy one another's patterns.

### Math Lesson for:

Toddlers/Preschoolers

(See Step 5: Adapt lesson for toddlers or preschoolers.)

### Content Area:

Geometry

### Learning Goals:

This lesson will help toddlers and preschoolers **meet the following educational standards**:

- Apply transformations and use symmetry to analyze mathematical situations
- Use visualization, spatial reasoning and geometric modeling to solve problems

### Learning Targets:

After this lesson, toddlers and preschoolers should be **more proficient** at:

- Recognizing and creating shapes that have symmetry
- Recognizing and applying slides, flips and turns
- Creating mental images of geometric shapes, using spatial memory and spatial visualization
- Recognizing and representing shapes from different perspectives
- Recognizing geometric shapes and structures in the environment and specifying their locations

## Symmetry Game

### Lesson plan for toddlers/preschoolers

#### Step 1: Gather materials.

**A mat**, divided in half with a clear line (line of symmetry) distinguishing the divider

**Pattern blocks**

**Pictures of symmetrical pattern blocks**marcialmiller.com/wordpress/2010/12/the-beauty-of-pattern-blocks/

**Note**: Small parts pose a choking hazard and are not appropriate for children age five or under. Be sure to choose lesson materials that meet safety requirements.

#### Step 2: Introduce activity.

- Show the pattern block symmetry pictures to the children.
**Ask**them what they notice about the pictures. Fold the pictures down the**line of symmetry**and again**ask**the children what they notice about the pictures. **Explain**the concept of**symmetry**to the children (the two sides of the whole are exactly like one another) and**explain**that today they are going to use pattern blocks to play.*The Symmetry Game*

#### Step 3: Engage children in lesson activities.

**Demonstrate**how to play the game, which is played in pairs, and choose a child to play the game with you.- Give the partners one mat. The first player puts down one pattern block. The pattern block should touch the
**line of symmetry**. The second player copies by placing the**same**block in the**same**place, but on the other side of the**line of symmetry**. - Continue the game until both players have used five or six blocks apiece. Point out that the designs they have made are
**symmetrical**.**Explain**that the design is**symmetrical**because each side of the line has blocks of the**same**color in the**same**place. - Remove the blocks and repeat the game. This time, the second player starts the game.

**Additional Extensions**

- Point out real things in your classroom that are
**symmetrical**. Show them to the children and**ask**: “Is this (object)**symmetrical**? Why or why not?”

- Create simple
**symmetrical**pictures, as well as some pictures that are not symmetrical.**Ask**: “Which of these pictures are**symmetrical**and which of these pictures are not?” Have the children explain their thinking.

#### Step 4: Teach math vocabulary.

**Symmetrical**:**symmetrical**.”)**Same**:**same**color and in the**same**place.”)**Line of Symmetry**:**line of symmetry**.”)

#### Step 5: Adapt lesson for toddlers or preschoolers.

##### Adapt Lesson for Toddlers

###### Toddlers may:

- Need some assistance in recognizing the various details of their photos, so that they can better duplicate those details in their mirrored drawings
- Need to see some additional examples of symmetry

###### Home child care providers may:

- Start the game with two pattern blocks and increase the blocks as the children’s understanding of
**symmetry**grows - Help point out the
**symmetrical objects**within the photo. “You have an eye on this side of your face. Will you need an eye on the other side of your face? Where should that eye go?” - Continue to point out the symmetry in objects around the room or in books

##### Adapt Lesson for Preschoolers

###### Preschoolers may:

- Grasp the concept of
**symmetry**and look for additional ways to extend their knowledge

###### Home child care providers may:

- Have the children go on a “symmetry hunt” around the room, identify symmetrical objects and draw these objects in a notebook. Children should have a math journal readily available to record their mathematical thinking, reasoning and observations. Share their findings. Make a classroom chart of symmetrical objects in the room.

### Suggested Books

by Loren Leedy (New York: Holiday House, 2012)*Seeing Symmetry*by Bobbie Kalman (New York: Crabtree Pub Co., 2010)*What is Symmetry in Nature?*by Charles G. Shaw (New York: Haperfestival, 1992)*It Looked Like Spilt Milk*

### Music and Movement

**Sing and act out “I’ve Got Two.”**www.metrolyrics.com/ive-got-two-lyrics-sesame-street.html

### Outdoor Connections

**Go on a**. Have the children bring their math journals with them so that they can write down or draw all of the symmetrical objects that they notice. If possible, collect some symmetrical objects to bring inside and investigate further.*“*symmetry hunt” outside

**Read**by Bobbie Kalman. Encourage the children to make connections between what they read in the book and what they see in their outdoor environment.*What is Symmetry in Nature?*

### Web Resources

**Many activities involving symmetry**pinterest.com/loreenleedy/seeing-symmetry/

**Online reading of Loren Leedy’s book,**www.loreenleedy.com/books/symmetry.html**Seeing Symmetry**

**Symmetry games and activities**www.onlinemathlearning.com/symmetry-grade1.html

**Children paint one butterfly wing to match the other wing, which is already colored in**. boowakwala.uptoten.com/kids/boowakwala-adventures-butterfly-butterflycolor.html.

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