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KS4 · Year 11 · Lesson plan

Credit cards — how they work and the minimum payment trap

A classroom-ready 60 minutes lesson plan with starter, main, plenary, differentiation, SEND adaptations, EAL support and assessment criteria. Free to use, no login.

Key Stage
KS4
Year group
Year 11
Age range
15–16
Duration
60 minutes
Subject
Maths / PSHE / Citizenship
Cost
Free

Learning aim

Pupils can explain how credit cards work, calculate the total cost of paying only the minimum each month, and recognise the "minimum payment trap" that keeps people in debt for decades.

CURRICULUM National Curriculum links

RESOURCES What you'll need

LESSON Lesson structure (60 minutes)

Opening
HOOK
"If you spent £1,000 on a credit card and only paid the minimum each month, how long would it take to clear the debt?" Take 3-4 guesses — most will say 2-5 years. Reveal: depending on APR, it can be 15-25 YEARS. And you'll pay £2,500-£3,500 in total. That's the "minimum payment trap" — and it's how credit card companies make their money.
Direct teach
TEACH
How credit cards work: (1) You're given a credit limit (e.g. £1,000) — the maximum you can borrow at any time. (2) Each month you get a statement showing what you owe. (3) If you pay the full balance by the due date: no interest, free credit. (4) If you pay only the minimum payment (usually 1-3% of balance): interest is charged on the rest. (5) APR = Annual Percentage Rate, typical UK card: 19-35%. Worked example: £1,000 balance at 25% APR, paying only £25/month minimum = 22 years to clear, £2,500 total paid. Show the dramatic chart.
Pupils apply
GUIDED
Pupils work through three calculator scenarios on the worksheet: Card 1: £500 balance, 19% APR, £20/month minimum — how long to clear, total cost? Card 2: £500 balance, 35% APR, £20/month minimum — same question. Card 3: £500 balance, 25% APR, £100/month (paying MORE than minimum) — same question. Compare results. Build the killer insight: paying MORE than the minimum dramatically reduces both time AND total cost.
Stretch / depth
CHALLENGE
"Your friend says credit cards are 'free money' because the bill comes later." Is this right? Pupils discuss. Build the nuance: credit cards CAN be useful when used correctly — interest-free if paid in full each month, helps build credit history, and gives Section 75 consumer protection on purchases over £100. The trap is when balances build and minimum payments become routine. Show Section 75: under UK law, if you use a credit card for a purchase between £100 and £30,000 and the seller fails (faulty goods, company goes bust), the credit card company is jointly liable for a refund.
Close
PLENARY
Each pupil writes: "A credit card is safe to use if I ___" and "The minimum payment trap is when ___." Share three. Final question: "Why might paying the minimum each month feel 'sensible' even though it's expensive?" (It feels manageable in the moment. The cost is hidden in the long term.)

DIFFERENTIATION Adapting for all learners

Support (working below ARE)

Use simple round-number scenarios (£100 balance, 20% APR, £5/month minimum). Provide pre-printed calculation tables.

Stretch (working above ARE)

Compare a credit card at 25% APR vs a personal loan at 8% for the same borrowed amount. Which is cheaper to clear in 3 years? Why might someone still use the credit card despite the higher rate?

SEND SEND adaptations

For pupils with dyscalculia: use the calculator worksheet with pre-filled formulas. For pupils with autism: provide a clear "rules of safe credit card use" card (always pay in full, never miss a payment, etc.). For pupils with anxiety: emphasise the lesson is about prevention, not fear — credit cards used well are a useful tool.

EAL EAL support

Vocabulary: "credit card", "balance", "APR", "minimum payment", "interest", "credit limit", "Section 75", "consumer protection". Sentence frame: "If I pay only the minimum, my £___ balance takes ___ years to clear and costs £___ in total."

ASSESSMENT Assessment criteria

Pupils can: (1) explain how credit cards work; (2) define APR; (3) calculate the total cost of paying minimum on a £500 balance at 25% over 5 years; (4) explain the minimum payment trap; (5) describe one consumer benefit (Section 75) of using a credit card.

HOME Homework pack

Four critical activities about how credit cards work. ~30 minutes.

Credit card vocabulary

What pupils do: Define these 6 terms: APR, minimum payment, grace period, balance transfer, credit limit, cash advance.

Expected output: A 6-row vocabulary table.

Marking guidance: 1 mark per accurate definition. 6 marks total.

Interest cost calculation

What pupils do: Someone spends £1,000 on a 24.9% APR credit card and pays only the £25 minimum payment each month. Use an online minimum-payment calculator to find: (a) months to pay off, (b) total interest paid.

Expected output: A 2-figure answer with screenshot or calculation.

Marking guidance: 3 marks for accurate findings (typically ~5+ years, ~£700+ interest).

Good vs bad use

What pupils do: Write 3 GOOD reasons to use a credit card responsibly and 3 BAD reasons to use one badly.

Expected output: A 6-point balanced list.

Marking guidance: 1 mark per valid reason. 6 marks total.

Extension (optional)

What pupils do: Find out: what is a "credit score"? How does it grow? What 3 things would lower it? Why does it matter for things like mortgages and renting?

Expected output: A 4-question research response.

Marking guidance: Up to 8 marks for accurate, thorough answers.

Family discussion prompt (safeguarding-aware)

Ask an adult: "How did you learn to manage credit cards? Did you ever make a mistake with them you would warn me about?"

SAFEGUARDING Classroom safeguarding

Note for teachers: Some pupils may have family members in debt or credit-card trouble. Frame discussion through fictional scenarios. If a pupil discloses worry about family finance or debt, take it seriously and follow safeguarding procedure outside the lesson. Reference StepChange (free debt advice charity) on the worksheet.

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