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Reach Crest Learning

Measure · Lesson 24 of 32

Full, empty and how much fits

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Let's look together

Capacity is how much a container can hold. An empty cup holds no drink now. A full cup is filled to its top.

Use the same small cup to compare two containers. Count how many cupfuls fill each. Pour carefully with an adult.

Two of four equal parts: half full
Look, point and talk with your adult.

Watch how I do it

A jug holds four small cupfuls. I put in two. That is half of its capacity. One cupful would be a quarter.

Your turn

One bottle holds 3 small cups of water; another holds 5 of the same cup. Which has greater capacity?

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Let's check together

The second bottle: it holds five cupfuls.

Try it away from the page

On a tray, compare two unbreakable containers. Record cupfuls; with an adult, look at litre markings on a jug.

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Adult notes · prerequisites, safety and coverage

Prerequisite: counting and halves. Adult supervision; water away from electrical devices. Compare capacity, not just current fill level.

Use large counters, blocks and paper before symbols. Revisit a lesson until the child can show and explain the idea. Numbers grow from 0–10 to 20, then 100; these pages are not a one-sitting course.

These are teaching introductions, not a claim of mastery. Open the subject's coverage map and limits.