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Cotmanhay Junior School

Safe, Happy Learning

Week 8 Area

National curriculum content


  • Calculate and compare the area of rectangles (including squares), and including using standard units, square centimetres (cm2) and square metres (m2) and estimate the area of irregular shapes


Lesson objectives

  • What is area?
  • Counting squares
  • Making shapes
  • Comparing area


What we want children to know


  • How to measure, compare, add and subtract: lengths (m/cm/mm)
  • How to measure the perimeter of simple 2-D shapes, to measure using the appropriate tools and units, progressing to using a wider range of measures, including comparing and using mixed units

    What skills we want children to develop

    Use knowledge to solve reasoning and problem solving questions such as:


    Testing conditions:

    Two children have measured the top of their desk. They used different sized squares.
    Dora says, “The area of the table top is 6 squares.”

    Alex says, “The area of the table top is 9 squares.”

    Who used the largest squares? How do you know?

    Making comparisons by drawing shapes:
    Use squared paper to draw 4 different rectilinear shapes with an area of 12 squares. Compare your shapes to a partner. Are they the same? Are they different?

    Mathematical Talk

  • What strategy can you use to ensure you don’t count a square twice?
  • Why are shapes with perpendicular sides more effective to find the area of rectilinear shapes?