Supermarket Sweep: spot the best deal

Audience: KS2 pupils (Y3-Y6)
Key Stage: KS2
Rounds: 10
Time: 10 min
Topic: Unit prices and best value
Last reviewed: 2026-07-23

How to play

You're doing the big shop. Each round shows two or three offers for the same thing — tap the one that's genuinely the best value. Careful: the biggest pack, the loudest label and the flashy "3 for 2" are sometimes traps. Your secret weapon is the unit price — what 100g, one litre or one bag actually costs — and the game shows the working after every pick. Fill your trolley, build a streak, earn your Rip-off Radar rating.

JavaScript needed. The Supermarket Sweep game needs JavaScript. For a paper version, enable JS and press "Print the paper version" — it lists every round with the unit-price working as answers.

For teachers: use this in class

Learning objectives: calculate unit prices (price per 100g, per litre, per item) using division; compare offers to decide best value; recognise that multibuy and was/now labels do not always mean cheaper (KS2 Maths — Measurement: money; foundations for Y6 ratio and proportion).
10-minute starter: project rounds 1-3 and have the class vote on each offer before anyone taps; pupils show the per-100g working on mini whiteboards, then compare with the game's answer. Ask "what would make the losing offer the better buy?"
Differentiation: support — write the rule "pence ÷ number of 100gs in the pack" on the board and allow calculators; stretch — pupils design their own trap offer where the bigger pack loses, show the working, and test it on a partner.
Discussion questions: Why do shops print the unit price in tiny writing on the shelf edge? When might the worse unit price still be the sensible buy (food waste, storage, not enough money today)? Why does a "was" price change how a "now" price feels?
Curriculum: England Maths NC Y4-Y6 (money, measurement, division); PSHE Association economic wellbeing KS2. See the curriculum map.

Pairs with: KS2 lesson — Comparison shopping before playing, and the making-change quiz as an exit ticket.

Cite this quiz
UK Tax Drag (2026). Supermarket Sweep: spot the best deal. Game. Available at: https://kids.uktaxdrag.co.uk/game-supermarket-sweep.html
CC BY 4.0. Free to use as exit tickets, retrieval practice, homework or self-assessment.

Game tips. Tap the offer card you think is best value — the unit-price working is shown after every pick, right or wrong. Fully keyboard-playable: Tab between offers, Enter to choose. Print the paper version gives all ten rounds with the working as answers.