Economics · Grade 10

Active learning ideas

Price Elasticity of Supply

Active learning helps students grasp price elasticity of supply by moving beyond abstract graphs to real-world decisions. When students manipulate supply factors directly, they see how production time, storage costs, and resource availability shape responsiveness to price changes.

• Ontario Curriculum Expectations
• HS.EC.2.3

• 20–45 min
• Pairs → Whole Class
• 3 activities

Activity 01

• Inquiry Circle
• 45 min · Small Groups

Inquiry Circle: The Sin Tax Analysis

Groups research the impact of Canadian taxes on tobacco or sugary drinks. They must explain why these specific items were chosen based on their elasticity and whether the tax successfully reduced consumption or just increased tax revenue.

Explain the factors that determine the price elasticity of supply for a product.

Facilitation Tip

During the Sin Tax Analysis, provide pre-cut newspaper clippings of tax policy changes to ground the discussion in current events.

What to look for

Provide students with a scenario: 'The price of artisanal cheese increased by 15%, and the quantity supplied increased by 30%.' Ask them to calculate the PES and state whether the supply is elastic, inelastic, or unit elastic. Then, ask them to identify one factor that might explain this elasticity.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Activity 02

• Think-Pair-Share
• 20 min · Pairs

Think-Pair-Share: Necessity vs. Luxury

Students are given a list of 10 items (e.g., WiFi, milk, designer shoes, salt). They must rank them from most inelastic to most elastic and justify their choices based on the availability of substitutes.

Analyze how time horizons (short run vs. long run) affect supply elasticity.

Facilitation Tip

For the Necessity vs. Luxury Think-Pair-Share, assign each pair one good from a shuffled set to avoid predictable pairings.

What to look for

Pose the question: 'Imagine a sudden surge in demand for electric vehicles. Discuss how the price elasticity of supply for EV batteries might differ in the short run (next 6 months) versus the long run (next 5 years). What factors would contribute to this difference?'

• Understand
• Apply
• Analyze
• Self-Awareness
• Relationship Skills

Activity 03

• Simulation Game
• 40 min · Small Groups

Simulation Game: The Revenue Maximizer

Students act as consultants for a local transit authority. They are given data on ridership and must decide whether to raise or lower fares to increase total revenue, discovering the relationship between elasticity and revenue through trial and error.

Compare the implications of elastic versus inelastic supply for market adjustments.

Facilitation Tip

In The Revenue Maximizer simulation, limit the time for each round to 90 seconds to maintain urgency and focus.

What to look for

Students receive a card with a product (e.g., concert tickets, wheat, custom-made furniture). They must write: 1. Their prediction for the PES of this product. 2. One reason for their prediction, referencing factors like production time or resource availability.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

A few notes on teaching this unit

Teaching elasticity requires emphasizing that it is a ratio, not a slope, and that its values change along the curve regardless of linearity. Research shows students grasp this better when they derive the formula themselves through guided data collection rather than memorizing definitions. Avoid rushing to formal equations before students experience the concept concretely.

Successful learning looks like students confidently distinguishing elastic from inelastic supply using numerical calculations and factor-based reasoning. They should articulate why some goods adjust quickly to price shifts while others cannot, connecting theory to business or policy examples.

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Watch Out for These Misconceptions

• During the Think-Pair-Share: Necessity vs. Luxury, watch for students equating steep slopes with high elasticity.

  Pause pairs to sketch a simple supply curve on the board, then have them stretch a rubber band along it while measuring the percentage change in quantity relative to price at different points.

• During The Revenue Maximizer simulation, watch for students assuming higher prices always increase revenue.

  After each round, display a quick calculation table on the projector showing Price × Quantity for all groups, then ask them to identify the turning point where revenue peaks.

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Methods used in this brief

• Inquiry Circle
• Think-Pair-Share
• Simulation Game