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Activity 1

Standards Alignment

Building On

Addressing

Building Toward

Instructional Routines

None

Materials

To Gather

Rulers

Activity Narrative

The purpose of this activity is for students to identify and draw shapes that have specific side lengths. Students practice measuring in inches and in centimeters. Students recognize that triangles, quadrilaterals, pentagons, and hexagons may look different when only some sides are the same length.

Launch

Groups of 2
Give each student a ruler.

Activity

“We are going to think more about shapes by measuring their sides. Use your ruler to identify and draw the shapes.”
7 minutes: independent work time
“Compare the shapes you have drawn with your partner’s shapes.”
5 minutes: partner discussion
Monitor for a variety of examples of Priya’s shape to share in the Activity Synthesis.

Diego draws a shape with fewer than 5 sides. Two sides are 3 centimeters long. Circle shapes that could be his shape.
Tyler draws a shape with 4 sides. Each side is 2 inches long.
1. Circle shapes that could be his shape.
2. Draw another shape that could be Tyler’s shape.
Priya draws a shape with more sides than Tyler’s shape. Only 1 side of her shape is 2 inches long. Draw 2 shapes that could be her shape.

Student Response

to access Student Response.

Advancing Student Thinking

If students‘ measurements are not the lengths of the given sides when measuring or drawing shapes, consider asking:

“Can you show me how you measured the sides of this shape?”
“How can you use the ruler to make sure the side is 2 inches long?”

Activity Synthesis

Select 2–3 previously identified students to share, or draw some examples, such as:

Consider asking, “What is the same about these shapes? What is different?”
“Why were we able to draw so many different shapes even though you had to use a certain length?” (Only one side had to be 2 inches. We could draw shapes with different numbers of sides.)

Activity 2

Standards Alignment

Building On

Addressing

Building Toward

Instructional Routines

None

Materials

To Gather

Rulers

Activity Narrative

The purpose of this activity is for students to recognize and draw shapes that have specific numbers of sides and corners, and specific side lengths. Students deepen their understanding that shapes in the same category can share many attributes and look different. Students also notice that some attributes can’t go together to form a shape (for example, a shape can’t have 3 sides and 4 corners, or 3 sides and all square corners).

Students may persevere in problem solving if they look for or choose particular attributes that do not go together (MP1). In some cases, such as a shape with 3 sides and 4 corners, they may be able to see right away that no such shape exists. But in other cases, such as a shape with 3 sides and 2 square corners or 6 sides and all square corners, they will need to experiment and reason in order to predict that no such shape exists.

MLR8 Discussion Supports. Invite students to begin partner interactions by repeating the question, “Which attributes match the shape I have drawn?” This gives both students an opportunity to produce language.
Advances: Conversing

Action and Expression: Internalize Executive Functions. Invite students to verbalize their strategy for the shape they will build before they begin. Students can share with their partner.
Supports accessibility for: Organization, Conceptual Processing, Language

Launch

Groups of 2
Give students access to rulers.
Display the attribute table.
“We have been learning about the attributes of shapes. This table shows some of the attributes of shapes we have been thinking about, such as number of sides, number or type of corners, and specific length of sides.”
Draw or display a rectangle with two sides that are 3 inches long.
“What attributes do you think were picked from this table to draw this shape?” (4 sides, 4 corners, all corners are square corners, 2 sides are the same length. It’s either 2 sides are 2 inches or 2 sides are 3 inches long.)
Circle the attributes that students identify on the attribute table.

Activity

“Now you will get a chance to pick your own attributes, draw your own shapes, and guess which attributes your partner picked.”
“If you have time, work with your partner to answer the last problem.”
5 minutes: independent work time
5 minutes: partner work time
Monitor for:
- A variety of triangles, quadrilaterals, pentagons, and hexagons.
- Students who attempt to combine attributes that do not result in a shape.

Choose your own attributes. Circle 1 in each row.

sides	3	4	5	6
corners	3	4	5	6
side length	1 side is 2 in.	2 sides are 2 in.	2 sides are 3 in.	4 sides are 2 in.
square corners	0	1	2	all square corners

Draw and name a shape with your attributes. If you can’t draw the shape, explain your reasoning.

Shape:

Name: ______________________________

Choose new attributes. Circle 1 in each row.

sides	3	4	5	6
corners	3	4	5	6
side length	1 side is 2 in.	2 sides are 2 in.	2 sides are 3 in.	4 sides are 2 in.
square corners	0	1	2	all square corners

Draw and name a shape with your attributes. If you can’t draw the shape, explain your reasoning.

Shape:

Name: ______________________________

Choose new attributes. Circle 1 in each row.

sides	3	4	5	6
corners	3	4	5	6
side length	1 side is 2 in.	2 sides are 2 in.	2 sides are 3 in.	4 sides are 2 in.
square corners	0	1	2	all square corners

Draw and name a shape with your attributes. If you can’t draw the shape, explain your reasoning.

Shape:

Name: ______________________________

Cover your attribute table. Trade papers with your partner. Guess which attributes they used.

If you have time: Are there any attributes that are impossible to put together to make a shape? Show your thinking, using drawings, numbers, or words.

Activity Synthesis

Invite previously selected students to share the shapes they have drawn.
For each, ask, “What attributes do you think they used to make this shape?”
30 seconds: quiet think time
Share responses.
Display student work that shows attributes that do not make a shape, or share attributes and display an image like the following:
- 4 sides, 3 corners, 2 sides are 2 inches, 1 square corner
“Why do you think _____ couldn’t finish this shape?”

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Settings

Language

Audience

Assessment Access

Lesson 3

Specific Side Lengths

Warm-up

Instructional Routines

Materials

Activity Narrative

Launch

Activity

Student Response

Advancing Student Thinking

Activity Synthesis

Activity 1

Standards Alignment

Building On

Addressing

2.G.A.1

2.MD.A.1

Building Toward

Instructional Routines

Materials

To Gather

Activity Narrative

Launch

Activity

Student Response

Advancing Student Thinking

Activity Synthesis

Activity 2

Standards Alignment

Building On

Addressing

2.G.A.1

2.MD.A.1

Building Toward

Instructional Routines

Materials

To Gather

Activity Narrative

Launch

Activity

Activity Synthesis

Lesson Synthesis

Standards Alignment

Building On

Addressing

2.G.A.1

Building Toward

Student Response

Advancing Student Thinking