A one-page Year 3 check on perimeter, with the answers on page 2. Question 1 asks pupils to count round a 4 by 3 rectangle on a centimetre grid. Question 2 gives two labelled shapes, an 8 by 2 rectangle and a triangle with sides of 5, 5 and 6 cm. Question 3 gives a square with a perimeter of 16 cm and asks for its side. Question 4 is a word problem about a rug 3 m long and 2 m wide. It follows England National Curriculum measurement for Year 3.
Measurement
“measure the perimeter of simple 2-D shapes”
Questions 1, 2 and 4 ask for a perimeter from a grid, from labelled sides and from a word problem.
Number - addition and subtraction
“solve problems, including missing number problems, using number facts, place value, and more complex addition and subtraction”
Question 3 works backwards from a perimeter of 16 cm to the side of a square.
Question 1 shows a blue rectangle on a 1 cm grid, with the size of one square marked, and an answer box.
Question 2 has an 8 cm by 2 cm rectangle for part a and a triangle for part b, with a line for each answer in centimetres.
Question 3 asks for the side of a square from its perimeter. Question 4 asks for the perimeter of a 3 m by 2 m rug. Each has an answer box.
Five answers with their sums, from 4 + 3 + 4 + 3 = 14 cm to 16 ÷ 4 = 4 cm.
End of unit
Set it after the last perimeter lesson and mark it the same day. It fits in about ten minutes.
Spotting gaps
Sort the marked sheets by question. A wrong answer to question 1 often means a pupil counted the squares inside the rectangle and not the edges around it.
Before and after
Give it as a short pre-test at the start of the unit and again at the end, so pupils can see their own progress.
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