# Lesson 11

Same Shapes

## Warm-up: How Many Do You See: 1 More and 1 Less on 5-frames (10 minutes)

### Narrative

The purpose of this How Many Do You See is for students to subitize or use grouping strategies to describe the images they see. The synthesis highlights that the images show 1 more and 1 less than the initial image. When students use the dot images to subitize, they look for and make use of the structure of 5 and 1 more or 1 less (MP7).

### Launch

• Groups of 2
• “How many do you see? How do you see them?”
• Flash the image.
• 30 seconds: quiet think time

### Activity

• Display the image.
• 1 minute: partner discussion.
• Record responses.
• Repeat for each image.

### Student Facing

How many do you see?
How do you see them?

### Activity Synthesis

• “How does the first image help you figure out how many dots there are in the second image?” (There is only 1 more dot. 5 and 1 more is 6.)

## Activity 1: Missing Shapes (10 minutes)

### Narrative

The purpose of this activity is for students to identify shapes that are the same, regardless of orientation, by filling in the missing pattern block in a puzzle. Students rotate the pattern blocks to determine which pattern block will fit, which helps students to develop the idea that a shape is the same in different orientations.
MLR8 Discussion Supports. Synthesis: Some students may benefit from the opportunity to rehearse what they will say with a partner before they share with the whole class.

### Required Materials

Materials to Gather

### Launch

• Groups of 2
• Give students pattern blocks.
• Display the student book.
• “What do you notice? What do you wonder?” (There are lots of different pattern blocks. I wonder why they are all missing a piece.)
• 30 seconds: quiet think time
• 30 seconds: partner discussion
• Share responses.
• “Figure out which pattern block is missing from each puzzle. Tell your partner how you know.”

### Activity

• 5 minutes: partner work time
• Monitor for students who rotate the pattern blocks to determine which fit.

### Activity Synthesis

• Invite previously identified students to share.
• Display the last puzzle:
• “Which pattern block is missing from this puzzle? How do you know?”
• “Even though the shape is tilted, we can turn the orange square to see that it fits.”

## Activity 2: Find the Shape (15 minutes)

### Narrative

The purpose of this activity is for students to identify examples of the same shape in different orientations. As in the previous activity, identifying the same shape in different orientations helps students to notice important properties of the shape, such as having 4 sides and having one side that is longer than the other 3 (MP7).

Representation: Access for Perception. Students with color blindness may benefit from access to colored pencils, or crayons with labels that indicate color and the appropriate pattern block shape.
Supports accessibility for: Visual-Spatial Processing

### Required Materials

Materials to Gather

### Launch

• Groups of 2
• Give each group of students pattern blocks and colored pencils or crayons.
• “Find all of the shapes in this puzzle that are the same as the red trapezoid pattern block. Color them red.”

### Activity

• 3 minutes: independent work time
• “Did you and your partner color in all of the same shapes?”
• 1 minute: partner discussion
• “Figure out how many red trapezoids there are. Write a number to show how many there are.”
• 1 minute: independent work time
• Repeat the steps with the green triangle, blue rhombus, orange square, yellow hexagon, and tan rhombus pattern blocks.

### Student Response

If students color shapes other than trapezoids red, consider asking:

• “How did you choose which shapes to color red?”
• “How can you use red trapezoid pattern blocks to find shapes that are the same?”

### Activity Synthesis

• Display the student book and point to the trapezoid in the bottom right corner of the picture.
• “What color did you color this shape? Why?” (Sample responses: Red. The red pattern block fit in the shape.)
• “Did you color fewer green triangles or orange squares? How do you know?”

## Activity 3: Centers: Choice Time (20 minutes)

### Narrative

The purpose of this activity is for students to choose from activities that offer practice building shapes and putting together shapes to form larger shapes.

Students choose from any stage of previously introduced centers.

• Geoblocks
• Build Shapes
• Pattern Blocks
• Less, Same, More

### Required Materials

Materials to Gather

### Required Preparation

• Gather materials from:
• Geoblocks, Stages 1 and 2
• Build Shapes, Stages 1 and 2
• Pattern Blocks, Stages 1-4
• Less, Same, More, Stages 1-4

### Launch

• “Today we are going to choose from centers we have already learned.”
• Display the center choices in the student book.
• “Think about what you would like to do first.”
• 30 seconds: quiet think time

### Activity

• Invite students to work at the center of their choice.
• 8 minutes: center work time
• “Choose what you would like to do next.”
• 8 minutes: center work time

Choose a center.

Geoblocks

Build Shapes

Pattern Blocks

Less, Same, More

### Activity Synthesis

• “When you were working in centers, did you try something that didn’t work? What did you do? Did you try something else?”

## Lesson Synthesis

### Lesson Synthesis

“Today we looked for shapes that matched.”
Display a green triangle pattern block and draw these 2 shapes:

“Which shape do you think is the same as the pattern block? Why do you think that?” (The shape on the left isn’t the same because it has a curved side. The shape on the right is the same because it has three sides and looks like the green pattern block, but it is on its side.)