Economics · Grade 10

Active learning ideas

Monopoly: Market Power and Inefficiency

Active learning works well for this topic because monopolies are abstract concepts that become clear when students manipulate prices, quantities, and barriers in concrete ways. Simulations and role-plays let students experience firsthand how market power shapes outcomes, making inefficiencies visible beyond abstract graphs.

• Ontario Curriculum Expectations
• HS.EC.3.4

• 30–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Simulation Game
• 45 min · Small Groups

Simulation Game: Monopoly Auction Game

Assign one student per group as the monopolist selling identical items like candy. Others bid as buyers with limited budgets. The monopolist sets prices over 5 rounds to maximize total revenue, then groups graph demand curves from data. Debrief compares to competitive pricing.

Explain the barriers to entry that allow a monopoly to persist.

Facilitation Tip

After setting up the Monopoly Auction Game, circulate with a timer to ensure all groups complete rounds and record outcomes before moving to the next phase.

What to look for

Provide students with a simplified cost and revenue schedule for a hypothetical monopolist. Ask them to identify the profit-maximizing quantity by finding where MR=MC and then determine the price the monopolist will charge using the demand curve. Ask: 'What is the key condition for profit maximization?'

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

Activity 02

• Fishbowl Discussion
• 30 min · Pairs

Graphing: Monopoly vs Competition Curves

Pairs receive demand and cost data. They plot marginal revenue, marginal cost, and demand curves, mark profit-maximizing points, and shade deadweight loss. Switch partners to verify graphs and discuss differences from perfect competition.

Analyze how a monopolist determines its profit-maximizing price and quantity.

Facilitation Tip

When graphing the monopoly vs competition curves, provide students with printed blank graphs and colored pencils to trace shifts in price and quantity.

What to look for

Pose the question: 'Is it always bad for a country to have monopolies?' Facilitate a class discussion where students debate the pros and cons, referencing specific barriers to entry and potential government regulations like price caps or antitrust laws.

• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Activity 03

• Fishbowl Discussion
• 40 min · Whole Class

Role-Play: Barriers to Entry Debate

Divide class into firms trying to enter a market controlled by a monopolist. Groups propose entry strategies while the monopolist defends barriers like patents. Vote on successful entries, then analyze impacts on price and quantity.

Critique the welfare implications of a monopoly compared to perfect competition.

Facilitation Tip

For the Barriers to Entry Debate, assign roles clearly and require each student to cite one real-world example before speaking.

What to look for

Ask students to write down two distinct barriers to entry that could allow a monopoly to exist. Then, have them explain in one sentence why a monopolist's price is typically higher than the price that would prevail in a competitive market.

• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Activity 04

• Case Study Analysis
• 35 min · individual then small groups

Case Study Analysis: Canadian Utility Monopoly

Individuals research Hydro One or Enbridge, noting barriers and pricing. In small groups, present findings, calculate hypothetical efficiencies, and propose regulations. Class votes on best interventions.

Explain the barriers to entry that allow a monopoly to persist.

What to look for

Provide students with a simplified cost and revenue schedule for a hypothetical monopolist. Ask them to identify the profit-maximizing quantity by finding where MR=MC and then determine the price the monopolist will charge using the demand curve. Ask: 'What is the key condition for profit maximization?'

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

A few notes on teaching this unit

Teachers should start with simulations to ground abstract ideas in experience, then use graphing to formalize understanding, and finally apply analysis through role-plays and case studies. Avoid diving straight into theory without concrete examples, as students often struggle to transfer abstract graphs to real markets. Research shows that repeated exposure to the same concepts through different activities reinforces understanding more than a single explanation.

Successful learning looks like students accurately calculating profit-maximizing quantities, explaining why monopolies restrict output, and identifying realistic barriers to entry without confusing legal and illegal causes. Discussions should show nuanced understanding of market tradeoffs, not just oversimplified judgments.

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Watch Out for These Misconceptions

• During the Monopoly Auction Game, watch for students who assume the highest bid wins the auction and set the price at that level. Redirect by asking groups to calculate total revenue at different bid levels and observe where profit peaks, showing that monopolists balance price and quantity.

  During the Graphing activity, watch for students who label the monopoly price at the intersection of demand and marginal cost. Redirect by having them trace the vertical line from the MR=MC quantity up to the demand curve to find the actual price, showing the gap between marginal cost and price.

• During the Monopoly Auction Game, watch for students who assume monopolists always produce more than competitive markets. Redirect by comparing the total units sold in competitive rounds versus monopoly rounds, and ask groups to calculate deadweight loss as missing units.

  During the Barriers to Entry Debate, watch for students who conflate illegal actions with all barriers. Redirect by providing a list of legal barriers (patents, licenses) and illegal barriers (collusion) and asking groups to categorize each, then defend their choices.

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Methods used in this brief

• Simulation Game
• Fishbowl Discussion
• Case Study Analysis