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Inflation: The Shrinking Dollar

Twelfth graders learn what inflation is — a general rise in prices that shrinks the buying power of money over time — what causes it, and why a little is normal but too much is harmful.

Grade 12Macroeconomics55 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…

  • ✓Define inflation.
  • ✓Explain buying power.
  • ✓Explain causes of inflation.
  • ✓Judge its effects.
Essential Question

Your grandparents paid a nickel for a candy bar. Today it costs over a dollar. Prices creep up year after year — what is inflation, and why does it make each dollar buy less?

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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 Buying-Power Calculator

Project this and change the inflation rate and years. Watch how inflation shrinks what $100 can buy over time!

💵 See how inflation shrinks the dollar!Try it
$100
Inflation: 3%/yr
Years: 10

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 — The Nickel Candy Bar

5 min

A candy bar once cost a nickel; now it’s over a dollar. Why do prices keep rising?

👩‍🏫 Teacher Moves

  • Compare old and new prices.
  • Ask why prices rise.
  • Set the inquiry.

🎒 Student Actions

  • Compare prices.
  • Wonder why.
  • Predict inflation.
2

Investigate — Explore Inflation

12 min

Students investigate.

👩‍🏫 Teacher Moves

  • Send students to the Buying-Power Calculator.
  • Change rate and years.
  • Note the shrinking dollar.

🎒 Student Actions

  • Change values.
  • Watch it shrink.
  • Note the effect.
3

Evaluate Evidence — Weigh the Evidence

13 min

Students analyze.

👩‍🏫 Teacher Moves

  • Define inflation.
  • Explain buying power.
  • Explain the causes.

🎒 Student Actions

  • Define it.
  • Explain power.
  • Explain causes.
4

Communicate — Make the Case

13 min

Students communicate.

👩‍🏫 Teacher Moves

  • Explain who inflation hurts and helps.
  • Argue about “good” inflation.
  • Support with evidence.

🎒 Student Actions

  • Explain effects.
  • Argue it.
  • Support it.
5

Take Action — Take Action

5 min

Students conclude.

👩‍🏫 Teacher Moves

  • Find a real inflation rate.
  • Explain its effect on families.
  • Complete the exit ticket.

🎒 Student Actions

  • Find 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.11.9-12

Use data to explain the influence of changing rates of inflation on economic decisions.

C3
D2.Eco.13.9-12

Explain how a nation’s money supply and interest rates affect the economy.

C3
D2.Eco.10.9-12

Explain influences on economic conditions.

C3
D4.1.9-12

Construct arguments using economic reasoning.

Differentiation

One lesson, every learner

Multilingual Learners

ELL / EMERGING READERS
  • Then-and-now price cards.
  • Sentence frame: “Inflation makes money buy ___.”
  • Use the calculator visually.

Support & Access

IEP / 504
  • Start with “prices go up.”
  • Use the calculator.
  • Focus on buying less.

Stretch & Extend

GIFTED / EARLY FINISHERS
  • Explain hyperinflation.
  • Explain the CPI.
  • Compare wages to inflation.
Materials

What to gather

  • 📽️Projector / board
  • 💵Old price examples
  • 💻The Buying-Power Calculator
  • 🧮Calculators
  • ✏️Pencils
  • 🎫Exit-ticket slips
Vocabulary

Key terms — hover for a quick definition

inflationa general rise in pricesbuying powerhow much money can buydeflationa general fall in pricescost of livingwhat it costs to buy essentialsCPIthe Consumer Price Indexpurchasing powerthe value of money in goodswagepay for workinterest ratethe cost of borrowing money
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 is inflation?
A general rise in the level of prices, which shrinks the buying power of money.
QUESTION 2
What happens to the value of a dollar during inflation?
It buys less over time.
QUESTION 3
Name one reason a person might ask for a raise.
To keep up with rising prices (inflation).

Take action: track inflation.

Have students find the current inflation rate and calculate how much a family’s $2,000 monthly budget loses in buying power over a year. A printable inflation 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.

🃏 InflationFlip
Card 1
Term
Tap to flip →
Meaning
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Nice work!

Practice · Quiz

Check your understanding

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

📝 InflationQuiz
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.

🖨️ InflationPrint
Name: ________________________
Date: ____________

Part A · Write the word that matches each meaning

Word bank: buying power, cost of living, CPI, deflation, inflation, interest rate, purchasing power, wage
  1. pay for work
  2. the cost of borrowing money
  3. a general fall in prices
  4. what it costs to buy essentials
  5. the Consumer Price Index
  6. how much money can buy
  7. a general rise in prices
  8. the value of money in goods

Part B · Show what you learned

  1. What is inflation?
  2. What happens to the value of a dollar during inflation?
  3. Name one reason a person might ask for a raise.
Answer key — Part A: 1) wage · 2) interest rate · 3) deflation · 4) cost of living · 5) CPI · 6) buying power · 7) inflation · 8) purchasing power
Part B: 1) A general rise in the level of prices, which shrinks the buying power of money. 2) It buys less over time. 3) To keep up with rising prices (inflation).