Economics & Business · Year 11

Active learning ideas

Price Elasticity of Supply (PES)

Active learning helps students grasp Price Elasticity of Supply (PES) because this concept relies on visualising producer responses to price changes, which abstract calculations alone cannot convey. When students manipulate data, draw graphs, and role-play scenarios, they connect numerical outcomes to real-world constraints, making elastic and inelastic supply meaningful rather than abstract.

• ACARA Content Descriptions
• AC9EC11K04

• 30–50 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Case Study Analysis
• 45 min · Small Groups

Data Stations: PES Calculations

Prepare four stations with industry datasets showing price and quantity changes, like coal and tourism. Groups calculate PES using the formula, plot points on supply curves, and note elasticity type. Rotate stations, then share findings in a class debrief.

Explain how time influences the elasticity of a supply curve.

Facilitation Tip

During Data Stations, circulate with a checklist to ensure students annotate their percentage change calculations with clear steps, not just final answers.

What to look for

Present students with a scenario: 'The price of avocados has doubled in one week. Describe whether the supply is likely to be elastic or inelastic in the short run and explain why, referencing at least one factor influencing PES.'

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

Activity 02

• Case Study Analysis
• 30 min · Pairs

Graphing Pairs: Time Horizons

Pairs draw short-run and long-run supply curves for an industry like beef farming. Shift the price up, measure quantity responses, and label elasticities. Compare graphs with another pair to discuss time's influence.

Calculate the price elasticity of supply for various industries.

Facilitation Tip

For Graphing Pairs, provide two different coloured pens to each pair so they can distinguish between short-run and long-run curves when tracing shifts.

What to look for

Provide students with a simple PES calculation formula. Ask them to calculate the PES for a product given a 10% price increase leading to a 5% increase in quantity supplied. Then, ask them to classify this supply as elastic, inelastic, or unit elastic.

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

Activity 03

• Case Study Analysis
• 50 min · Whole Class

Market Simulation: Whole Class Role-Play

Assign students as producers in a fruit market. Announce price changes; producers signal quantity adjustments via cards. Tally class supply, calculate average PES, and graph the curve to visualize elasticity.

Analyze the factors that determine the elasticity of supply.

Facilitation Tip

In the Market Simulation, assign roles with varying resource constraints—e.g., farmers with perishable goods versus miners with fixed contracts—to intensify time-sensitive decisions.

What to look for

Facilitate a class discussion: 'Imagine you are a baker. How would the time it takes to bake bread influence your ability to respond to a sudden increase in the price of bread? Compare your short-run and long-run supply decisions.'

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

Activity 04

• Jigsaw
• 40 min · Small Groups

Jigsaw: Factors Analysis

Divide factors like mobility and capacity among groups; each researches one Australian industry example. Regroup to teach peers, then rank industries by PES and justify with evidence.

Explain how time influences the elasticity of a supply curve.

Facilitation Tip

During the Case Study Jigsaw, give each expert group a laminated card with a factor (e.g., storage costs, production time) to physically place on a class poster when presenting its impact on PES.

What to look for

Present students with a scenario: 'The price of avocados has doubled in one week. Describe whether the supply is likely to be elastic or inelastic in the short run and explain why, referencing at least one factor influencing PES.'

• Understand
• Analyze
• Evaluate
• Relationship Skills
• Self-Management

A few notes on teaching this unit

Teachers often introduce PES by first contrasting it with price elasticity of demand (PED) to prevent confusion, using side-by-side graphs to highlight the positive slope of supply curves. Research shows students retain elasticity concepts better when they experience the ‘why’ behind calculations—such as why miners cannot instantly increase iron ore supply after a price jump. Avoid rushing to formulas; instead, build intuition through scenarios before formalising methods.

By the end of these activities, students will confidently calculate PES, interpret graphs showing time horizons, justify producer decisions in simulations, and analyse factors affecting supply elasticity. Success looks like students using precise language to explain why PES varies across contexts and timeframes, supported by evidence from their work.

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Watch Out for These Misconceptions

• During Data Stations: PES Calculations, watch for students confusing PES with PED because both use percentage changes.

  During Data Stations, have students write ‘PES only measures producer response’ at the top of their calculation sheets and circle the word ‘supply’ in every scenario to reinforce the concept before they begin.

• During Graphing Pairs: Time Horizons, watch for students assuming supply curves always become steeper over time.

  During Graphing Pairs, ask students to label each curve with its timeframe and write a one-sentence explanation below why the long-run curve might be flatter or steeper than the short-run curve, using their own words.

• During Market Simulation: Whole Class Role-Play, watch for students concluding that elastic PES always leads to higher revenue.

  During the simulation, provide each group with a revenue calculator sheet to complete after price changes, forcing them to link elasticity values to total revenue outcomes and debate the results in debrief.

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Methods used in this brief

• Case Study Analysis
• Jigsaw