### Planning and Activities

**Day 1**Model and explore finding the area of a rectangle by counting squares, then by using number facts to multiply the number of squares in a row by the number of rows.

**Further Teaching with Y4**

Model finding areas of rectilinear compound shapes by splitting them into rectangles.

**Group Activities: T with Y3**

Y3 -- Find the area of book covers by counting squares, then by calculating.

-- Calculate areas. Draw rectangles with a given area.

Y4 -- Divide rectilinear shapes into rectangles to support finding the area.

**Day 2**Model finding the perimeter of a rectangle by measuring all four sides, then adding. Introduce measuring just the length and width of the rectangle and using a doubling and adding strategy to find the perimeter.

**Group Activities: T with Y4**

Y3 -- Measure the perimeter of 2-D shapes using cm.

-- Calculate the perimeter of 2-D shapes using cm.

Y4-- Find the perimeter of a range of rectangles. Some children draw rectangles with a given perimeter.

**Day 3**Revise how to find perimeter. Draw different rectangles with an area of 16cm2, then explore to determine which has the least/greatest perimeter. Draw a sequence of squares: 1cm × 1cm, 2cm × 2cm, 3cm × 3cm. Find the perimeter and area of each; reason about number patterns.

**Group Activities: T with Y3**Y3/4 -- Explore patterns and relationships between the perimeter and area of squares and rectangles.