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      Read scales in metres and centimetres

      Lesson details

      Learning outcome

      I can read scales in metres and centimetres.

      Key learning points

      1. Rulers are marked in centimetres
      2. Counting in ones helps you to measure in centimetres
      3. Counting in tens helps you to measure in metres

      Keywords

      • Ruler - A tool for measuring length.

      • Metre stick - A tool for measuring length which is one metre long.

      Common misconception

      Children may align the end of their object with the end of the ruler, rather than zero.

      Use a sticker or coloured pen to highlight the zero on the ruler so that children's attention is drawn to the zero when they are measuring length using a ruler.

      Teacher tip

      The examples within this lesson refer only to full metre lengths and children are not expected to work with mixed units at this point. They do not need to be aware of the conversion between metres and centimetres, but should know that a metre is bigger than a centimetre.

      Licence

      This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      Metres and centimetres are __________ units of measure.

      Correct answer: standard
      non-standard

      Q2.
      Which of these lengths could be about one metre?

      The width of a paper clip
      Correct answer: The average height of a five-year-old child
      The length of a leaf

      Q3.
      A metre is a __________ measure of length than a centimetre.

      shorter
      Correct answer: longer

      Q4.
      True or false. It is sensible to measure the width of a book in centimetres.

      Correct answer: True
      False

      Q5.
      Which lengths would you measure in centimetres?

      Correct answer: The length of a toy car
      The height of a door
      Correct answer: The length of a pencil
      Correct answer: The height of a toy astronaut
      The length of a skipping rope

      Q6.
      Choose the correct unit of measure. My bedroom is about 3 __________ long.

      Correct answer: metres
      centimetres

      6 Questions

      Q1.
      When you use a ruler to measure length, you should always start at __________.

      An image in a quiz
      one centimetre
      Correct answer: zero
      the end of the ruler

      Q2.
      True or false. Alex has measured the length of the eraser correctly. He says it is 6 cm long.

      An image in a quiz
      True
      Correct answer: False

      Q3.
      This pen is cm long.

      An image in a quiz
      Correct Answer: 12

      Q4.
      When we measure length in metres, we use __________.

      a ruler
      Correct answer: a metre stick
      bricks

      Q5.
      The crocodile is metres long.

      An image in a quiz
      Correct Answer: 6, six

      Q6.
      The van is __________.

      An image in a quiz
      Correct answer: 2 metres tall
      2 centimetres tall
      2 metres long
      2 centimetres long

      To help you plan your 2 maths lesson on: Read scales in metres and centimetres, download all teaching resources for free and adapt to suit your pupils' needs...