Area (age 8+)

PROCEDURAL

Mathematics›Measurement|Ages 8—9|ID: mt_y1n0Zwhoca

Measure areas by counting unit squares (square cm, square m, square in, square ft)

Mastery Evidence

Count unit squares to find the area of an L-shaped figure
Measure the area of a book cover using square-centimetre tiles
Compare areas of two shapes by counting their unit squares

Assessment Prompt

“If [child] draws a shape on squared centimetre paper, can they find its area by counting the squares — including making a sensible estimate for any partial squares?”

Prerequisites1

Understanding Area
hardAges 8—9

Show full prerequisite tree

Understanding Area hard
Must understand unit squares and area concept before measuring by counting
- Measuring length (age 7+) soft
  Length measurement experience supports understanding area as a 2D measurement
  - Measuring length (age 6+) hard
    Using standard measurement tools extends measuring with non-standard units
    - Measuring length and height (age 5+) hard
      Measuring with iterated units extends Y1 beginning to measure length
      - Comparing Lengths & Heights hard
        Measuring length with units requires first being able to compare lengths directly
        
        Measurable Attributes of Objects hard
        Comparing lengths/heights requires first identifying length as a measurable attribute
    - Measuring length soft
      Measuring with units benefits from ability to order and compare lengths
      - Comparing Lengths & Heights hard
        Ordering 3 objects by length and indirect comparison extends direct length comparison
        
        Measurable Attributes of Objects hard
        Comparing lengths/heights requires first identifying length as a measurable attribute
  - Choosing measurement units soft
    Choosing appropriate tools builds on choosing appropriate units
    - Capacity and volume hard
      Using standard units for capacity extends from beginning to measure capacity
      - Comparing Capacity hard
        Measuring capacity with units requires first being able to compare capacities
        
        Measurable Attributes of Objects hard
        Comparing capacity requires understanding capacity as a measurable attribute
    - Measuring length and height (age 5+) hard
      Using standard units for length extends from beginning to measure length
      - Comparing Lengths & Heights hard
        Measuring length with units requires first being able to compare lengths directly
        
        Measurable Attributes of Objects hard
        Comparing lengths/heights requires first identifying length as a measurable attribute
    - Measuring mass and weight hard
      Using standard units for mass extends from beginning to measure mass
      - Measuring mass and weight (age 4+) hard
        Measuring mass with units requires first being able to compare masses directly
        
        Measurable Attributes of Objects hard
        Comparing mass/weight requires first identifying mass as a measurable attribute

Unlocks3

Area by Tiling
hardAges 8—9
Mathematical Precision
softAges 8—9
Estimating volume
hardAges 9—10