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Unit 3 - Lesson 20 - Grade 3: Illustrative Mathematics

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Grade 3 Unit 3

Lesson 20: More Practice to Represent and Solve

CC BY 2021 Illustrative Mathematics®

Grade 3 Unit 3

Lesson 20: More Practice to Represent and Solve

CC BY 2021 Illustrative Mathematics®

Lesson: More Practice to Represent and Solve

Number Talk: Two Steps (Warm Up)

Info Gap: Introduction

1
Pitanje 5
5.

Problem Card:

A room has some chairs set up in rows and some chairs stacked up in a corner.

How many chairs are in the room?

Info Gap: Bake Sale

Cool Down: Reflection
1

Find the value of each expression mentally.

1
Pitanje 1
1.

20 + (2 x 3)

1
Pitanje 2
2.

30 + (4 x 3)

1
Pitanje 3
3.

50 + (8 x 3)

1
Pitanje 4
4.

90 + (8 x 3)

Round 1

Your teacher will give you either a problem card or a data card. Do not show or read your card to your partner.

Problem Card Student: Silently read the problem card.

Data Card Student: Silently read the data card.

Problem Card Student:

"Can you tell me______?" (Ask for a specific piece of information)

Data Card Student:

"Why do you need to know _____?" (Repeat the information requested)

Problem Card Student:

"I need to know _______ because _______."

Data Card Student:

Listen to your partner's reason. Answer with information from the data card.

Problem Card Student:

Continue asking questions until you can say, "I have enough information to solve this problem."

Display the problem card.

1
Pitanje 6
6.

Solve the problem independently.

Data Card Student:

Share Data Card, then compare strategies and solutions.

Pause here so your teacher can review your work.

Ask your teacher for a new set of cards and repeat the activity, trading roles with your partner.

Round 2

Your teacher will give you either a problem card or a data card. Do not show or read your card to your partner.

Problem Card Student: Silently read the problem card.

Data Card Student: Silently read the data card.

Problem Card Student:

"Can you tell me______?" (Ask for a specific piece of information)

Data Card Student:

"Why do you need to know _____?" (Repeat the information requested)

Problem Card Student:

"I need to know _______ because _______."

Data Card Student:

Listen to your partner's reason. Answer with information from the data card.

Problem Card Student:

Continue asking questions until you can say, "I have enough information to solve this problem."

Display the problem card.

1
Pitanje 7
7.

Solve the problem independently.

Data Card Student:

Share Data Card, then compare strategies and solutions.

Pause here so your teacher can review your work.

Ask your teacher for a new set of cards and repeat the activity, trading roles with your partner.

Pitanje 8
8.

Describe something you really understand well after today’s lesson or describe something that was confusing or challenging.