Numbers on a number line
Understand a coordinate system defined by two perpendicular number lines (axes) with an origin at (0,0); know that an ordered pair (x, y) specifies a unique point where the first number gives horizontal distance and the second gives vertical distance from the origin
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“If your child looks at a map with a grid and you describe a location as "3 across and 5 up from the origin", can they find the exact point — and explain what each of the two numbers tells you?”
Full guide and materials
- Activity. Understand a coordinate system defined by two perpendicular number lines (axes) with an origin at (0,0); know that an ordered pair (x, y) specifies a unique point where the first number gives horizontal distance and the second gives vertical distance from the origin
What to notice. Identify the x-axis, y-axis, and origin on a coordinate grid • Explain that (3, 5) means go 3 along the x-axis and 5 up the y-axis • Distinguish (2, 4) from (4, 2) by explaining each coordinate's meaning
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If your child looks at a map with a grid and you describe a location as "3 across and 5 up from the origin", can they find the exact point — and explain what each of the two numbers tells you?
Understand a coordinate system defined by two perpendicular number lines (axes) with an origin at (0,0); know that an ordered pair (x, y) specifies a unique point where the first number gives horizontal distance and the second gives vertical distance from the origin
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Check understanding
- Identify the x-axis, y-axis, and origin on a coordinate grid
- Explain that (3, 5) means go 3 along the x-axis and 5 up the y-axis
- Distinguish (2, 4) from (4, 2) by explaining each coordinate's meaning
“If your child looks at a map with a grid and you describe a location as "3 across and 5 up from the origin", can they find the exact point — and explain what each of the two numbers tells you?”
Curriculum record
- Type
- Conceptual
- Subject
- Mathematics
- Domain
- Geometry
- Age range
- Ages 10–11
Standards