Math // Measurement

Capacity and volume

Measure and begin to record capacity and volume using non-standard and standard units

Ages
5 to 6
Type
Method
Builds on
1 topic
Leads to
1 topic
Standards
1 code

Quick check

If the learner fills a jug using a small cup, can they count how many cups it takes — and understand that this tells you how much the jug holds?

Ask this to see whether the topic is secure.

Topic // Mastery

What mastery looks like

What a learner can do once this topic is secure.
  • Measure capacity by counting how many cups fill a container
  • Begin to use litres as a unit of capacity
  • Record capacity measurements with a number and unit

Topic // Map

Where this fits

What to learn first and what this topic opens up, with the reason for each link. Required links come first.
  • RequiredMust come first
  • HelpfulHelps, but not essential

Before this

1 topic
  • Comparing CapacityRequired

    Measurement // Ages 4 to 6

    Measuring capacity with units requires first being able to compare capacities

You are here

Capacity and volume

Ages 5 to 6 // Method

Leads to

1 topic
  • Choosing measurement unitsRequired

    Measurement // Ages 6 to 7

    Using standard units for capacity extends from beginning to measure capacity

Topic // Research-informed

Teaching notes

From the Marble Skill Taxonomy. These notes have not been validated in classrooms, so treat them as a starting point for your own judgement.

The approach

Young children (around 5-6) quantify capacity by repeated filling and pouring with IDENTICAL units: counting how many cupfuls fill a container (non-standard units), then meeting the litre and a marked measuring jug (standard units), recording each result as a number + unit ('4 cups', '2 litres'). The core insight — shared with length and mass — is the inverse relationship: a bigger cup means FEWER cupfuls fill the same container. Reading a marked vessel means valuing its intervals, not just counting marks. Real water play is the natural companion to any screen model.

Common misconceptions

  • Uses different-sized cups yet counts 'more cupfuls = holds more' (unit-size ignorance)
  • Fills cups inconsistently (part-full) but counts them as equal
  • Reads a measuring jug by marks rather than intervals; misjudges a level between graduations
  • Loses count or spills, then reports the count anyway

Useful representations

  • Filling a container cupful-by-cupful with identical cups
  • A marked measuring jug / litre jug
  • The count record ('4 cups', '2 litres')
  • Identical unit-cups (equal measures)

Teaching practices

  • Fill with identical cups and count the cupfuls, recording number + unit ('4 cups', '2 litres')
  • Keep the unit consistent — mixing cup sizes breaks the count
  • Fill each cup to the same level (brim or a mark) so cupfuls are equal
  • Introduce the litre and a marked measuring jug; read the level against the intervals
  • Estimate first, then check by filling

Activities to try

  1. 1

    Fill, count, record — then swap the cup

    Why it works: The same container needs fewer cupfuls when the cup is bigger — a larger unit gives a smaller count (inverse relationship) — and a capacity measurement is only meaningful when the units are identical and consistently filled.

    1. Fill a container cupful by cupful using identical cups, filling each cup to the same mark or brim, and keep a running count (e.g. pour until the count climbs to 8).
    2. Record the result as a number and unit, e.g. 'the jug = 8 cups'.
    3. Now fill the SAME container again using a bigger cup, filling each to the brim, and count again (e.g. this time only 4).
    4. Say out loud what changed: the container didn't change, so why did the count change? Record 'the jug = 4 big cups'.
    5. Estimate first, then check by filling, for a new container.
  2. 2

    Read the measuring jug by its intervals

    Why it works: A measuring vessel is read by valuing the spaces (intervals) between marks against the level, not by simply counting lines — the same skill as reading a ruler or dial.

    1. Work out what one interval on the jug is worth: find two labelled whole-litre marks, count the equal spaces between them, and share the litre between them (e.g. if one unlabelled line sits halfway between the 0 and 1 litre marks, there are two equal spaces, so each space is worth half a litre and that line marks half a litre).
    2. Read the water level to the nearest interval and say how much water is in the jug.
    3. Practise with a level that falls between two graduations and judge the nearest mark.
    4. Explain how you knew a particular line means half a litre — justify it from the spacing you counted, don't just count lines.
    5. Introduce the litre as a standard unit and record readings with number + unit.
  3. 3

    Practice and check: cupful counts, jug reading, and ordering

    Why it works: Secure that identical units and the inverse relationship govern capacity counts, and that jug readings depend on interval value — able to apply these to fresh cases.

    1. Complete fill-in items such as 'the jug = ___ cupfuls' after a filling activity.
    2. Answer 'read the measuring jug' items where you identify the level to the nearest interval.
    3. Decide whether a bigger cup needs MORE or FEWER cupfuls to fill the same container, and explain why.
    4. Sequence several containers by capacity.
    5. Answer the probe: 'You needed 4 big cups but 8 small cups for the same jug — how can it be both?' and 'If you filled the jug with a tiny egg-cup instead of a mug, would you need more or fewer? Why?'

Topic // Standards

Curriculum standards

Codes for the curriculum statements this topic maps to. Each publisher owns its standard text.
The national curriculum in England: Key stages 1 and 2 framework document
Maths/Y1/M/7

Math // Measurement

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