standard_description: Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = �� – 3, 6 + 6 = ��.
problem_activity: Narrative
The purpose of this activity is to introduce stage 2 of the Connecting Cubes center. Students use connecting cubes to make objects pictured on cards. As they work, observe whether students match the connecting cubes to the image or count the number of connecting cubes in the image to create their own object (MP6).
Required Materials
Materials to Gather
Connecting cubes
Materials to Copy
Connecting Cubes Stage 2 Cards
Required Preparation
Create a set of cards from the blackline master for each group of 2.
Launch
Groups of 2
“We are going to look at a new center that you can choose during center choice time.”
Display the student book.
“How could you use connecting cubes with this picture?” (We can make things with our connecting cubes that look like the picture in the book.)
30 seconds: quiet think time
1 minute: partner discussion
Share responses.
Activity
Give each group of students connecting cubes and a set of cards.
Display the student page.
“Use your connecting cubes to build this object.”
3 minutes: independent work time
“Choose another card and use your connecting cubes to build the object.”
3 minutes: independent work time
Student Facing
[IMG]
Student Response
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Activity Synthesis
“Show your partner what you made and describe it to them.”
2 minutes: partner discussion
Invite several students to share what they heard their partner say.


aligns: no