standard_description: Use a pair of perpendicular number lines, called axes, to define a coordinate system, with the intersection of the lines (the origin) arranged to coincide with the 0 on each line and a given point in the plane located by using an ordered pair of numbers, called its coordinates. Understand that the first number indicates how far to travel from the origin in the direction of one axis, and the second number indicates how far to travel in the direction of the second axis, with the convention that the names of the two axes and the coordinates correspond (e.g., x-axis and x-coordinate, y-axis and y-coordinate).
problem_activity: Narrative
The purpose of this activity is for students to facilitate the Estimation Exploration they created in the previous activity for another group in the class. Each group should be paired with another group and they will take turns facilitating their Estimation Exploration for the other group. If time allows, students could facilitate their Estimation Exploration with more than 1 group.
MLR8 Discussion Supports.
At the appropriate time, give students 2–3 minutes to make sure that everyone in their group can explain their Estimation Exploration activity. Invite groups to rehearse what they will say when they share with the whole class.
Advances: Speaking, Conversing, Representing
Required Materials
Materials to Gather
Chart paper
Colored pencils, crayons, or markers
Launch
Groups of 3 or 4
Give each group a piece of chart paper and a marker to record responses.
“Pair up with another group in the class. Each group will present their Estimation Exploration.”
Activity
10–12 minutes: small-group work time
Remind students to switch roles halfway through the time allowed.
Student Facing
Display your image for your classmates.
Ask them, “What is an estimate that’s too high?” “Too low?” “About right?”
Give them a minute of quiet think time.
Give them a minute to discuss together.
Have them share estimates.
Record their ideas.
Student Response
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Activity Synthesis
“What did you learn as you presented your Estimation Exploration?” (I learned that ranges of estimates might be bigger than you expect. I learned that it’s important to understand the size of the items you are trying to estimate or be familiar with it, otherwise you cannot make good estimates.)


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