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Market Structures

Twelfth graders explore the four market structures — perfect competition, monopolistic competition, oligopoly, and monopoly — and how the amount of competition shapes prices, choices, and a firm’s power.

Grade 12Microeconomics55 minutes1 class periodC3 InquiryExplicit teaching4 StandardsC3
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Lesson at a Glance

Everything you need before the bell rings

Learning Objectives

Students will be able to…

  • ✓Identify the four market structures.
  • ✓Explain competition’s effect.
  • ✓Compare monopoly and competition.
  • ✓Place markets on a spectrum.
Essential Question

Wheat farmers can’t set their own price, but your local water company can. Why? The amount of competition in a market changes everything. What are the different market structures?

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Lesson Phases
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Vocabulary Terms
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Standards Aligned
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Interactive Task
Investigate · Interactive

The Market Structures Explorer

Project this and tap each structure. Have students see how competition ranges from many sellers to just one!

📊 Explore the market structures — tap eachTry it

The Lesson · C3 Inquiry Arc (Question · Investigate · Evaluate Evidence · Communicate · Take Action)

55 minutes, five moves

Tap any phase to open the teacher moves and student actions.

1

Question — Who Sets the Price?

5 min

A wheat farmer can’t set prices, but a water company can — why?

👩‍🏫 Teacher Moves

  • Compare two markets.
  • Ask why they differ.
  • Set the inquiry.

🎒 Student Actions

  • Compare them.
  • Wonder why.
  • Predict the idea.
2

Investigate — The Structures

12 min

Students investigate.

👩‍🏫 Teacher Moves

  • Send students to the Market Structures Explorer.
  • Note each structure.
  • Note the competition.

🎒 Student Actions

  • Tap each.
  • Note structures.
  • Note competition.
3

Evaluate Evidence — Weigh the Evidence

13 min

Students analyze.

👩‍🏫 Teacher Moves

  • Compare competition levels.
  • Explain price power.
  • Explain the spectrum.

🎒 Student Actions

  • Compare them.
  • Explain power.
  • Explain the spectrum.
4

Communicate — Make the Case

13 min

Students communicate.

👩‍🏫 Teacher Moves

  • Classify real markets.
  • Explain the effects on consumers.
  • Support with evidence.

🎒 Student Actions

  • Classify them.
  • Explain effects.
  • Support it.
5

Take Action — Take Action

5 min

Students conclude.

👩‍🏫 Teacher Moves

  • Identify a local market’s structure.
  • Explain its effect on prices.
  • Complete the exit ticket.

🎒 Student Actions

  • Identify it.
  • Explain it.
  • Complete the exit ticket.
Standards Alignment

Built to the standards you report on

Aligned to the C3 Framework for Social Studies State Standards (Economics).

C3
D2.Eco.6.9-12

Analyze how competition among sellers affects prices and quality.

C3
D2.Eco.7.9-12

Analyze how firms use costs and revenues to make decisions.

C3
D2.Eco.3.9-12

Analyze the ways markets coordinate exchange.

C3
D4.1.9-12

Construct arguments using economic reasoning.

Differentiation

One lesson, every learner

Multilingual Learners

ELL / EMERGING READERS
  • Structure + example cards.
  • Sentence frame: “In a ___, there are ___ sellers.”
  • Use market examples.

Support & Access

IEP / 504
  • Start with monopoly vs. competition.
  • Use clear examples.
  • Place on a line.

Stretch & Extend

GIFTED / EARLY FINISHERS
  • Analyze a real oligopoly.
  • Explain barriers to entry.
  • Debate regulating monopolies.
Materials

What to gather

  • 📽️Projector / board
  • 🏪Market examples
  • 💻The Market Structures Explorer
  • 📊A structure spectrum
  • ✏️Pencils
  • 🎫Exit-ticket slips
Vocabulary

Key terms — hover for a quick definition

market structurehow competitive a market isperfect competitionmany sellers, identical productsmonopolistic competitionmany sellers, differentiated productsoligopolya few dominant firmsmonopolya single sellercompetitionrivalry among sellersbarrier to entrysomething that blocks new firmsprice powera firm’s ability to set prices
Evaluate

Exit Ticket

Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.

QUESTION 1
What are the four market structures?
Perfect competition, monopolistic competition, oligopoly, and monopoly.
QUESTION 2
Which structure has a single seller controlling the market?
A monopoly.
QUESTION 3
How does more competition usually affect prices?
It tends to lower prices and improve quality for consumers.

Take action: name a monopoly.

Have students identify a near-monopoly or oligopoly in their community and argue whether it should be regulated, using economic evidence. A printable market-structures sheet is in the Social Studies library.

Study · Flashcards

Study the key terms

Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.

🃏 Market StructuresFlip
Card 1
Term
Tap to flip →
Meaning
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Practice · Quiz

Check your understanding

A quick self-check with instant feedback, drawn from this lesson’s key terms.

📝 Market StructuresQuiz
Score: 0
1 / 6
Question 1
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Nice work!

Practice · Worksheet

Printable worksheet

A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.

🖨️ Market StructuresPrint
Name: ________________________
Date: ____________

Part A · Write the word that matches each meaning

Word bank: barrier to entry, competition, market structure, monopolistic competition, monopoly, oligopoly, perfect competition, price power
  1. many sellers, differentiated products
  2. a single seller
  3. many sellers, identical products
  4. a firm’s ability to set prices
  5. a few dominant firms
  6. something that blocks new firms
  7. rivalry among sellers
  8. how competitive a market is

Part B · Show what you learned

  1. What are the four market structures?
  2. Which structure has a single seller controlling the market?
  3. How does more competition usually affect prices?
Answer key — Part A: 1) monopolistic competition · 2) monopoly · 3) perfect competition · 4) price power · 5) oligopoly · 6) barrier to entry · 7) competition · 8) market structure
Part B: 1) Perfect competition, monopolistic competition, oligopoly, and monopoly. 2) A monopoly. 3) It tends to lower prices and improve quality for consumers.