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# Week 4 Measurement and 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

1. What is area?
2. Counting squares
3. Making shapes
4. 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?
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