Look at this picture: a full one-litre carton of juice sitting beside a small cup. How many of those little cups do you think it would take to empty the whole carton? And which one is measured in litres, do you think?

Look at each jug of juice, mark by mark. Read the level each time, keeping the jug flat and your eye level with the line. What big amount are the marks heading towards?

We will drag our one jug on the board to four amounts in turn: first 100 ml, then 300 ml, then 600 ml, then 950 ml. Some of these do not land on a big 250 mark. Read each one aloud before we check.

At your station you have a real jug and some water. Estimate then measure three containers, going from smallest to largest: an egg cup, a mug, and a small bottle. On your Capacity Record Sheet, write down your estimate first, then the real amount and its unit.

Before the stretch, watch this worked example of pairing containers to make 1 litre. Suppose a mug measures 300 ml and a small bottle measures 700 ml. Write both amounts, add them: 300 + 700 = 1,000 ml. That is exactly 1 litre, so this pair works. If the total is a little under or over 1,000 ml, say about 1 litre.

Stretch task: using your own measured amounts, find two containers that together hold about 1 litre. Write both amounts, add them, and check the total.