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Unit 3, Lesson 14

Center Day 2

Grade 1

Warm-up

10 mins

True or False: Expressions on Both Sides

Instructional Routines

True or False?

to see where instructional routines fit in your journey.

Materials

None

Activity Narrative

The purpose of this True or False? is to elicit strategies students have for determining whether two expressions have the same value. Students may find the value of each expression, or they may reason about the numbers on each side of the equal sign. This will be helpful later when students compare addition expressions.

Launch

Display one equation.
“Give me a signal when you know whether the statement is true and can explain how you know.”
1 minute: quiet think time

Activity

Share and record answers and strategy.
Repeat with each equation.

Student Task Statement

Decide whether each statement is true or false.
Be prepared to explain your reasoning.

Student Response

to access Student Response.

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Advancing Student Thinking

Are You Ready for More?

Activity Synthesis

“Who can restate _____'s reasoning in a different way?”
“How could you figure out that is not equal to without finding the sum of both sides?” (Both sides have 5 + 1 but the right side has 1 more added on to make .)

Activity 1

15 mins

Introduce Number Puzzles—Within 20

Standards Alignment

Building On

Addressing

Instructional Routines

None

to see where instructional routines fit in your journey.

Materials

To Copy (from Blackline Masters)

Number Puzzles Addition and Subtraction Stage 2 Gameboard

To Gather

Materials from previous centers

Activity Narrative

The purpose of this activity is for students to learn Stage 2 of the Number Puzzles center. Students work together to use number cards to make addition and subtraction equations within 20 true. Each digit (0–9) can only be used once in a puzzle. Puzzles with fewer than 10 spaces will have leftover cards.

Action and Expression: Develop Expression and Communication. Give students access to connecting cubes.
Supports accessibility for: Conceptual Processing, Memory

Launch

Groups of 2
Give each group a set of digits (0–9) and a set of gameboards.
“We are going to do a new Number Puzzles center. This time, the puzzles are within 20 instead of 10. You need to place the digit cards to make each equation true. Remember, you can only use each digit once on a gameboard and some puzzles will have leftover cards.”

Activity

10 minutes: center work time

Student Task Statement

None

Student Response

None

Advancing Student Thinking

Are You Ready for More?

Activity Synthesis

Display Puzzle 1.
“Which equation would you start with? Why would you start there?”

Activity 2

25 mins

Centers: Choice Time

Standards Alignment

None

Building On

Addressing

Building Toward

Instructional Routines

None

to see where instructional routines fit in your journey.

Materials

To Gather

Materials from previous centers

Activity Narrative

The purpose of this activity is for students to choose from activities that focus on adding and subtracting within 20. Students choose from any of previously introduced stages of the listed centers.

Number Puzzles
Shake and Spill
Compare

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.
Advances: Speaking

Launch

Groups of 2
“Now you will 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.
10 minutes: center work time
“Choose what you would like to do next.”
10 minutes: center work time

Student Task Statement

Choose a center.

Number Puzzles

Shake and Spill

Compare

Student Response

None

Advancing Student Thinking

Activity Synthesis

“What method do you use most often to add within 20? Why do you use that method the most?”

Lesson Synthesis

“Today we learned a new game that we can play during center time.”

“How did you and your partner work together during centers? What went well? What can we continue to work on?”

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Standards Alignment

Building On

Addressing

Building Toward

to access Student Response.

Are You Ready for More?

Building Toward

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Assessment Access

Lesson 14

Center Day 2

Warm-up

True or False: Expressions on Both Sides

Instructional Routines

Materials

Activity Narrative

Launch

Activity

Student Task Statement

Student Response

Advancing Student Thinking

Are You Ready for More?

Activity Synthesis

Activity 1

Introduce Number Puzzles—Within 20

Standards Alignment

1.OA.C.6

Instructional Routines

Materials

Activity Narrative

Launch

Activity

Student Task Statement

Student Response

Advancing Student Thinking

Are You Ready for More?

Activity Synthesis

Activity 2

Centers: Choice Time

Standards Alignment

Instructional Routines

Materials

Activity Narrative

Launch

Activity

Student Task Statement

Student Response

Advancing Student Thinking

Activity Synthesis

Lesson Synthesis

Have a correction or suggestion?

Standards Alignment

1.OA.C.6

1.OA.D.7

Are You Ready for More?

1.OA.D.8