standard_description: Use variables to represent numbers and write expressions when solving a real-world or mathematical problem; understand that a variable can represent an unknown number, or, depending on the purpose at hand, any number in a specified set.
problem_activity: Narrative
The purpose of this How Many Do You See is for students to subitize or use grouping strategies to describe the images they see. The synthesis highlights that the images show 1 more and 1 less than the initial image. When students use the dot images to subitize, they look for and make use of the structure of 5 and 1 more or 1 less (MP7).
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.
Repeat for each image.
Student Facing
How many do you see?
How do you see them?
[IMG]
[IMG]
[IMG]
Student Response
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Activity Synthesis
“How does the first image help you figure out how many dots there are in the second image?” (There is only 1 more dot. 5 and 1 more is 6.)


aligns: no