Maths Year 4 Summer Measures and Data

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

Measure in m, cm, mm; convert units (suggested as 2 days)

Planning and Activities

Day 1 Teaching
Before the lesson, draw round the outline of two children and an adult from other classes. Bring these to lesson and display. Show a metre stick. Use this to estimate the heights of the outlines. Measure one of the outlines and model how we record this: 134cm is 1 metre and 34cm or 1.34m. Repeat with the other two outlines.
Group Activities
-- Convert height measurements from centimetres to metres and centimetres.
-- Convert distance measurements (aeroplane heights) from metres to kilometres.

Day 2 Teaching
Show some pencils. Discuss what unit to use to measure them. Explain that using millimetres will give a more accurate measurement. Model accurate measuring and show on the IWB with pictures of a pencil and ruler. Write: length = 125mm. Recall that 1cm = 10mm. So, we divide 125mm by 10 to get 12.5cm. Repeat with other millimetres to centimetre conversions.
Group Activities
Use the ‘Timeline’ in-depth problem-solving investigation below as today’s group activity.
Or, use these activities:
-- Measure lines in millimetres and convert them to centimetres.

You Will Need

  • People outlines
  • Metre stick
  • Mini-whiteboards and pens
  • ‘Height’ recording table (see resources)
  • Blank cards
  • Sticky tack
  • Rulers
  • Sharpened coloured pencils

Worksheets

Day 1
Convert measurements from centimetres to metres and vice-versa

Day 2
Measure lines in millimetres and convert them to centimetres.

Mastery: Reasoning and Problem-Solving

  • Look at these lengths. Estimate their accuracy.
    Tick if they look correct.
    -- Car length: 4.5m
    -- Cat, nose to tail: 0.42m
    -- Mobile phone: 15mm
    -- Wax crayon 100mm
    -- Teaspoon: 200cm
  • Write the missing numbers or units.
    3.4cm = ☐mm
    ☐cm = 2.35m
    10m = 1000☐
    129mm = ☐cm
    3400mm = 3.4☐

In-depth Investigation: Timeline
Children use their knowledge about millimetres, centimetres and metres to create a scale timeline from 0 to the current year, and gain some sense of the order of historical events.

Extra Support

Expert Estimates
Estimating in metres and centimetres