Activity 01
Flyer Deal Hunt: Compare Purchases
Distribute local store flyers. Pairs select three similar items, calculate sale prices after discounts plus 13% HST, and determine the best deal by total cost. Pairs present top picks to class for vote.
Explain how to calculate the final price of an item after a discount and sales tax.
Facilitation TipIn Flyer Deal Hunt, have pairs verify each other’s percentages before moving to the next item to catch misplaced decimal errors early.
What to look forPresent students with a scenario: 'A video game originally costs $60 and is on sale for 20% off. Ontario's HST is 13%. Calculate the final price.' Ask students to show their work and circle their final answer.
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Activity 02
Store Simulation: Role-Play Checkout
Form small groups as stores with invented sales. Shoppers visit each store, calculate totals for budgeted lists including tax, and negotiate trades. Groups debrief calculation accuracy.
Analyze the impact of different discount percentages on the total cost of an item.
Facilitation TipDuring Store Simulation, assign one student to the cashier role and one to the customer, then rotate roles to reinforce both perspectives.
What to look forPose the question: 'Imagine two stores offer the same $100 item. Store A offers 30% off, and Store B offers 15% off plus an additional 10% off the sale price. Which store offers a better deal? Explain your reasoning using calculations for both scenarios.'
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Activity 03
Discount Relay: Percentage Races
Teams line up. Each member calculates one step (discount, sale price, tax, total) for a given item, tags next teammate. First team with all correct wins; review errors as class.
Justify the importance of understanding sales tax in personal budgeting.
Facilitation TipIn Discount Relay, provide calculators only for the final tax step so students practice mental math with discounts first.
What to look forGive each student a flyer with a sale item. Ask them to calculate the sale price after a 25% discount and then the final price including 13% HST. They should write down the original price, sale price, and final cost.
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Activity 04
Budget Challenge: Plan Outfits
Individuals receive $150 budgets for clothing. They research online prices, apply average discounts and tax, track totals in spreadsheets, and justify choices in short shares.
Explain how to calculate the final price of an item after a discount and sales tax.
Facilitation TipFor Budget Challenge, set a strict 5-minute timer per round to push students to prioritize needs over wants in their outfit planning.
What to look forPresent students with a scenario: 'A video game originally costs $60 and is on sale for 20% off. Ontario's HST is 13%. Calculate the final price.' Ask students to show their work and circle their final answer.
AnalyzeEvaluateCreateDecision-MakingSelf-ManagementRelationship Skills
Generate Complete Lesson→A few notes on teaching this unit
Teach this topic by having students work backward from the final price to the original whenever possible. Encourage group verifications so students catch their own errors before submission. Avoid teaching the “discount plus tax” shortcut until students have mastered the sequential steps, as it reinforces the misconception that percentages add together.
Students will accurately calculate original prices, apply discounts, determine sale prices, apply sales tax, and compute final totals. They will explain each step in the process and justify their choices when comparing different deals.
Watch Out for These Misconceptions
During Store Simulation, watch for students who calculate sales tax on the original price instead of the discounted price.
Remind students to check their shared worksheets where the sale price is clearly labeled; have peers verify the tax calculation is applied to the sale price only.
During Flyer Deal Hunt, watch for students who assume a 50% discount always saves more money than a 10% discount.
Have pairs create a quick comparison chart on scrap paper showing original prices and final totals; prompt them to compare absolute savings rather than just percentage rates.
During Discount Relay, watch for students who add the discount and tax percentages together to find the total cost.
Use play money manipulatives to show the base price shrinking after discount and then growing again with tax; ask peer teachers to explain why the steps cannot be combined.
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