Lesson 5
Center Day 1 (optional)
Warmup: How Many Do You See: Hundreds, Tens, and Ones (10 minutes)
Narrative
The purpose of this How Many Do You See is to allow students to use subitizing or grouping strategies to describe the images they see.
Record the ways students see the blocks using equations. For example, if a student said they saw the first image as 2 hundreds, then 5 tens, and then the 4 ones, record this as \(200 + 50 + 4 = 254\). If a student said they saw the image as 2 hundreds, 3 tens and 2 tens, and then 4 ones, record this as \(200 + 30 + 20 + 4 = 254\).
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.
 “Discuss your thinking with your partner.”
 1 minute: partner discussion
 Record responses using equations. (For example, I saw 234 and 2 more tens. \(234 + 20 = 254\))
 Repeat for each image.
Student Facing
How many do you see? How do you see them?
Student Response
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Activity Synthesis
 “How did the groups help you to know the value of the blocks?” (We described seeing the same kinds of blocks together. People saw hundreds with hundreds, tens with tens, and ones with ones.)
Activity 1: Introduce Five in a Row, Add within 1,000 without Composing (20 minutes)
Narrative
The purpose of this activity is for students to learn stage 7 of the Five in a Row: Addition and Subtraction center. Students add within 1,000, without composing tens or hundreds. Partner A chooses two numbers and places a paper clip on each number. They add the numbers and place a counter on the sum. Partner B moves one of the paper clips to a different number, adds the numbers, and places a counter on the sum. Students take turns moving one paper clip, finding the sum, and covering it with a counter. The winner is the first one to get five counters in a row.
Required Materials
Materials to Gather
Materials to Copy
 Five in a Row Addition and Subtraction Stage 7 Gameboard
Required Preparation
Each group of 2 students needs 10 counters and 2 paper clips.
Launch
 Groups of 2
 Give each group two paper clips, counters, and a gameboard.
 “We are going to learn a new stage in the Five in a Row center.”
 “Let’s play one round together. You can all be my partner.”
 “I’ll put a paper clip on two numbers in the grey boxes that we will add and we’ll put a counter on the sum. What is the sum?”
 1 minute: quiet think time
 Share responses and demonstrate covering the sum on the gameboard with a counter.
 “Then the next player moves one of the paper clips, adds the numbers, and puts a counter on the sum.”
 “Continue taking turns until someone gets 5 in a row.”
Activity
 15 minutes: partner work time
Activity Synthesis
 “What strategies did you use to add the numbers?”
 “What strategies did you come up with for picking your paper clip number?”
Activity 2: Centers: Choice Time (20 minutes)
Narrative
The purpose of this activity is for students to choose from activities that focus on place value and addition with threedigit numbers.
Students choose from any stage of previously introduced centers.
 Five in a Row: Addition and Subtraction
 Get Your Numbers in Order
 Mystery Number
 The Greatest of them All
Required Materials
Materials to Gather
Required Preparation
Gather materials from:
 Five in a Row: Addition and Subtraction, Stages 6–7
 Get Your Numbers in Order, Stage 2
 Mystery Number, Stage 2
 The Greatest of them All, Stage 2
Launch
 “Now you will choose from centers we have already learned. One of the choices is to continue with Five in a Row.”
 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
Student Facing
Choose a center.
Five in a Row: Addition and Subtraction
Get Your Numbers in Order
Mystery Number
The Greatest of them All
Activity Synthesis

“What did you like about the activities you worked on today?”