Comparing Value for Money

Active learning works well for comparing value for money because students need to handle real items, compare concrete numbers, and discuss their reasoning. Calculating unit prices becomes clearer when they measure grams or millilitres themselves rather than just looking at labels.

• Year 5
• Mathematics
• 4 activities
• 30 min–45 min

Learning Objectives

1. Calculate the unit price for various products to determine the best value for money.
2. Compare the cost-effectiveness of different product sizes and quantities using division and decimals.
3. Design a personal strategy for making informed purchasing decisions based on value for money.
4. Critique common marketing strategies that may obscure the true value of products.

Ready-to-Use Activities

Collaborative Problem-Solving

⏱ 45 min·Small Groups

Supermarket Sweep: Cereal Comparison

Provide flyers or real cereal boxes in small groups. Students record total price and mass, calculate unit price per 100g using division, then rank options. Groups present top value with evidence.

Prepare & details

Analyze the most effective way to compare value for money between two different sized products.

Facilitation Tip: During Supermarket Sweep, have students physically weigh cereal samples to confirm grams before calculating.

Setup: Groups at tables with problem materials

Materials: Problem packet, Role cards (facilitator, recorder, timekeeper, reporter), Problem-solving protocol sheet, Solution evaluation rubric

• Apply
• Analyze
• Evaluate
• Create
• Relationship Skills
• Decision-Making
• Self-Management

Collaborative Problem-Solving

⏱ 30 min·Pairs

Drink Deal Debate: Pairs Challenge

Pairs receive labels from juice bottles of varying sizes and prices. They compute price per litre, compare results in a table, and debate which offers best value considering taste preferences.

Prepare & details

Design a strategy for a consumer to make informed purchasing decisions.

Facilitation Tip: For Drink Deal Debate, assign roles so each pair must defend their calculation to the other.

Setup: Groups at tables with problem materials

Materials: Problem packet, Role cards (facilitator, recorder, timekeeper, reporter), Problem-solving protocol sheet, Solution evaluation rubric

• Apply
• Analyze
• Evaluate
• Create
• Relationship Skills
• Decision-Making
• Self-Management

Collaborative Problem-Solving

⏱ 35 min·Whole Class

Marketing Makeover: Whole Class Critique

Display ads with misleading claims as a class. Students vote on value using unit prices, then redesign packaging labels to show true comparisons clearly.

Prepare & details

Critique common marketing tactics that might mislead consumers about value.

Facilitation Tip: In Marketing Makeover, display packaging side-by-side and ask students to circle hidden costs like excess plastic.

Setup: Groups at tables with problem materials

Materials: Problem packet, Role cards (facilitator, recorder, timekeeper, reporter), Problem-solving protocol sheet, Solution evaluation rubric

• Apply
• Analyze
• Evaluate
• Create
• Relationship Skills
• Decision-Making
• Self-Management

Collaborative Problem-Solving

⏱ 40 min·Individual

Budget Shop: Individual Planner

Give each student a $20 budget and product lists. They calculate unit prices, select items for best value, and justify choices in a shopping list report.

Prepare & details

Analyze the most effective way to compare value for money between two different sized products.

Facilitation Tip: During Budget Shop, provide a blank table so students structure their price and quantity data before writing conclusions.

Setup: Groups at tables with problem materials

Materials: Problem packet, Role cards (facilitator, recorder, timekeeper, reporter), Problem-solving protocol sheet, Solution evaluation rubric

• Apply
• Analyze
• Evaluate
• Create
• Relationship Skills
• Decision-Making
• Self-Management

Teaching This Topic

Teachers should first model a worked example with clear steps: note size, note price, divide, label. Avoid skipping the labeling step because students often forget to distinguish between price per gram and price per kilogram. Research shows students learn best when they teach their method to peers, so pair or small-group sharing deepens understanding. Keep the focus on process, not just answers, by asking 'How did you reach that rate?' often.

What to Expect

Successful learning looks like students confidently calculating unit prices, explaining why a larger package may not be cheaper, and justifying choices with evidence. By the end, they should prefer unit rates over total prices or marketing claims.

Watch Out for These Misconceptions

Common Misconception

During Supermarket Sweep, watch for students who assume the larger cereal box is automatically the better deal without checking unit prices.

What to Teach Instead

Give each group a 500g box priced at $4 and a 1kg box priced at $7.50. Require them to calculate both unit prices on the board and identify the cheaper rate before they can claim which is better value.

Common Misconception

During Drink Deal Debate, watch for students who rely on the discount percentage rather than recalculating the unit price after the sale.

What to Teach Instead

Provide a small bottle on sale for 20% off and a larger bottle at full price. Ask pairs to calculate the final unit price for both and defend which is truly cheaper, forcing them to compare actual rates instead of percentages.

Common Misconception

During Budget Shop, watch for students who select options based only on the lowest total price without considering quantity.

What to Teach Instead

Give students a 250g snack priced at $2.50 and a 400g snack priced at $4.00. Require them to fill a results table with unit prices and justify their choice in writing, linking quantity to value.

Assessment Ideas

Quick Check

After Supermarket Sweep, present students with two biscuit options (250g for $3.00 vs. 400g for $4.50). Ask them to calculate the unit price for each and write which offers better value, showing their work.

Discussion Prompt

During Marketing Makeover, pose the question: 'A cereal box is advertised as 'Family Size' for $6, while a smaller box costs $4. What information do you need to decide which is actually better value?' Guide students to discuss quantity and unit price calculation.

Exit Ticket

After Drink Deal Debate, give students a scenario: 'You need to buy juice. Option A is 1 litre for $3.50. Option B is 500ml for $1.80.' Ask them to calculate the unit price for both and state which is the better deal, explaining their reasoning in one sentence.

Extensions & Scaffolding

• Challenge students who finish early to create a 'worst value' option by combining two small packs priced higher than one large pack.
• For students who struggle, provide pre-calculated unit prices for one option and ask them to find the missing price that would make the other option equal.
• Deeper exploration: Invite a local shopkeeper to explain how unit pricing affects their pricing strategy and stocking decisions.

Key Vocabulary

Unit Price	The cost of one standard unit of an item, such as the price per gram, per litre, or per item. It is calculated by dividing the total cost by the total quantity.
Value for Money	The relationship between the price of a product or service and the quality or quantity received. It means getting the most benefit for the amount paid.
Cost-Effectiveness	The degree to which a purchase provides good results or benefits in relation to its cost. It focuses on achieving the best outcome for the money spent.
Consumer	A person who purchases goods and services for personal use. Consumers make choices about what to buy based on needs, wants, and perceived value.