Short Blocks

Maths Year 3 Autumn Measures

Each unit has everything you need to teach a set of related skills and concepts.

Measure length (m/cm) and convert units (suggested as 2 days)

Planning and Activities

Day 1 Teaching
Look at a metre stick and ascertain how many centimetres it is. Find 50cm, 25cm, 75cm, etc. Measure different objects in centimetres.
Group Activities
Use the ‘Hands and Fingers’ in-depth problem-solving investigation below as today’s group activity.
Or, use these activities:
-- Measuring heights using cm. Convert to m and cm.

Day 2 Teaching
Choose suitable units to measure different objects. Measure our feet in cm. Discuss the need for a smaller unit. Demonstrate how to use mm for accuracy.
Group Activities
-- Are both our feet the same size? Measuring feet in mm and comparing. Convert to cm and mm.

You Will Need

  • Metre stick & tape measures
  • Measuring objects (see resources)
  • Recording heights (see resources)
  • ITP: Ruler
  • ‘Are both our feet the same size?’ (see resources)

Mental/Oral Maths Starters

Suggested for Day 1
Know 3x table (simmering skills)

Suggested for Day 2
Know facts for 4x table (simmering skills)

Mastery: Reasoning and Problem-Solving

  • Draw a wiggly line of about 10cm in length. Use a piece of damp string to help you measure it accurately. Write its length in cm and mm. Repeat this trying to draw a wiggly line of exactly 10cm.
  • True or false?
    Ten lots of 100mm is the same as 1 metre.
    Half a centimetre is 50mm.
    There are 200mm in 20cm.
    5 metres is longer than 5000mm.
    The average domestic cat is about 40cm, tip of nose to end of tail.


In-depth Investigation: Hands and Fingers
Children test a theory finding and using accurate measurements to the nearest half centimetre.

Extra Support

Old Measures
Measuring lengths in centimetres and finding the difference between two lengths by counting up