Take three hands-up answers, not open call-outs. Listen for the word double. If a pupil changes only one ingredient, hold that thought for Watch and Notice rather than correcting it now.

Give five seconds of quiet think-time before any hands go up.

Pancakes for 4: name each share (2 eggs, 400 g flour, 600 ml milk); ask which bar is biggest and why.

Doubled to 8, the key move. Ask first: if the flour doubles, what must happen to eggs and milk? Hold out for every ingredient. Name the scale factor aloud (2); the bars show shares still lined up.

Smoothie tripled — a scale factor that is not 2, modelling the ×3 that comes next. 1 banana to 300 ml milk becomes 3 bananas to 900 ml milk. Ask what happens to each bar; both triple, ratio stays 1 to 3.

Squash 1:4 in 1 litre — five parts share one litre, so one part is 200 ml. Juice bar 200 ml, water bar 800 ml; ask what the two amounts add to.

Talk this one through together — pupils take turns at the board and the class agrees or corrects out loud.

Start with the smoothie 1:5 (6 parts) filling 900 ml. Before setting the total, ask the class: how many equal parts share the total? (6, so one part is 150 ml.) Then reveal the actual amounts (banana 150 ml, milk 750 ml). Keep pupils naming the one-part value each time, and try the second prompt if time allows.

This is the practice round — pupils take turns at the board, check each answer, and the class confirms before moving on. Keep the board work brisk rather than over-explaining.

The lemon drink is the easy start: 1:2 makes 3 parts sharing 900 ml, so one part is 300 ml (lemon 300 ml, water 600 ml). For the nut-and-raisin mix, the board shows how 250:100 simplifies to 5:2 (÷50); that gives 7 parts, so 100 g per part (nuts 500 g, raisins 200 g). The paint mix is the stretch: 2:3 in 2.5 litres means 5 parts, so one part is 500 ml (blue 1000 ml, white 1500 ml). Push the strongest pupils to state the one-part value out loud before touching the bars.