Economics & Business · Year 11

Active learning ideas

Price Elasticity of Demand (PED)

Active learning works for price elasticity because calculations and real-world examples help students move beyond abstract formulas. Pairing math with concrete data makes the concept both measurable and meaningful, especially when students test their own predictions.

• ACARA Content Descriptions
• AC9EC11K04

• 25–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Case Study Analysis
• 30 min · Pairs

Pairs: PED Calculation Relay

Pairs receive scenario cards with before-and-after price and quantity data for goods like coffee or textbooks. One student calculates the midpoint PED while the partner checks and explains elasticity type. Switch roles for three rounds, then share class results on a board.

Explain why some products remain in high demand regardless of price hikes.

Facilitation Tip

During the PED Calculation Relay, circulate and listen for pairs arguing over whether to use original or average values, then pause the class to model the midpoint method on the board.

What to look for

Provide students with a scenario: 'The price of movie tickets increased from $15 to $18, and the number of tickets sold decreased from 200 to 160.' Ask students to calculate the PED using the midpoint formula and state whether demand is elastic or inelastic. Check their calculations and interpretation.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Activity 02

• Case Study Analysis
• 45 min · Small Groups

Small Groups: Supermarket Elasticity Hunt

Groups visit school canteen or analyze online supermarket data for price changes and sales volumes of items like fruit versus snacks. Calculate PED using midpoint formula, classify as elastic or inelastic, and hypothesize reasons like availability of substitutes. Present findings with graphs.

Calculate the price elasticity of demand using the midpoint formula.

Facilitation Tip

For the Supermarket Elasticity Hunt, provide receipts or shelf prices from a fictional store so students calculate PED using real data without leaving the classroom.

What to look for

Pose the question: 'Why might the demand for a holiday cruise be more elastic than the demand for essential medication?' Facilitate a class discussion where students identify and explain the relevant determinants of PED for each product.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Activity 03

• Case Study Analysis
• 35 min · Whole Class

Whole Class: Revenue Maximization Simulation

Display a demand schedule on the board for a product like soft drinks. Class votes on price changes as a business team, calculates total revenue after each, and tracks the elastic-inelastic transition point. Discuss why revenue peaks at unitary elasticity.

Analyze the implications of elastic versus inelastic demand for businesses.

Facilitation Tip

In the Revenue Maximization Simulation, assign roles so one student adjusts the price while another tracks total revenue and graphs the results in real time.

What to look for

Ask students to write down one product they purchased recently. Then, have them identify whether the demand for that product is likely elastic or inelastic and provide one reason why, referencing a determinant of PED.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Activity 04

• Case Study Analysis
• 25 min · Individual

Individual: Elasticity Factor Sort

Students receive cards listing factors like necessity status, substitutes, or time period. Sort into 'makes demand more elastic' or 'less elastic' piles, then justify with PED examples. Pair up to compare and refine sorts.

Explain why some products remain in high demand regardless of price hikes.

Facilitation Tip

For the Elasticity Factor Sort, give students cut-out cards with products and determinants, then have them justify placements to peers before finalizing the categories.

What to look for

Provide students with a scenario: 'The price of movie tickets increased from $15 to $18, and the number of tickets sold decreased from 200 to 160.' Ask students to calculate the PED using the midpoint formula and state whether demand is elastic or inelastic. Check their calculations and interpretation.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

A few notes on teaching this unit

Teach PED by starting with simple scenarios and gradually introducing complexity. Avoid overwhelming students with too many determinants at once. Use pair work to build confidence in calculations, then shift to small groups for debate about real products. Research shows that students grasp elasticity better when they see how it connects to total revenue, so emphasize the revenue link through simulations and discussions.

Successful learning looks like students confidently using the midpoint formula, distinguishing elastic from inelastic demand, and explaining how price changes affect revenue. They should connect calculations to real products and defend their classifications with evidence.

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Watch Out for These Misconceptions

• During the PED Calculation Relay, watch for students using original price and quantity instead of the midpoint formula.

  Pause the relay halfway and have students recalculate using the midpoint formula on the board, comparing results to highlight why midpoint avoids bias.

• During the Supermarket Elasticity Hunt, students may assume all necessities have perfectly inelastic demand.

  Ask groups to find small but measurable changes in quantity for necessities like milk or bread, then use their data to discuss degrees of inelasticity.

• During the Revenue Maximization Simulation, students might focus on the sign of PED rather than its absolute value.

  After the simulation, ask students to graph revenue against price and observe that revenue peaks when elasticity transitions from elastic to inelastic.

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Methods used in this brief

• Case Study Analysis