Compound Interest — The 8th Wonder

What You'll Learn

💪 $100 at 10% interest becomes $110 after year 1. Then $121 after year 2. To use this skill, follow these steps: First, understand the problem. Read it again if you need to. What is it really asking? Next, think about what you know. Have you seen something like this before? What worked last time? Then, come up with ideas. Try to think of at least TWO possible answers before picking one. The first idea isn't always the best! Finally, check your work. Does your answer make sense? Can you explain WHY you chose it? If you can explain your thinking, you really understand it. Remember: smart thinkers aren't people who never make mistakes — they're people who LEARN from mistakes!

Key Concept: Understanding exponential money growth

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Think About This

Your group needs to solve a problem using understanding exponential money growth. Everyone has a different idea. How do you decide which approach to try first?

Thinking Steps

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🔍 Understand

Read carefully. What is the question about understanding exponential money growth really asking?

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📋 Gather Info

What facts and clues do you have? List what you know.

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💡 Think of Options

Come up with at least 2 possible answers. Don't pick the first one yet!

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✅ Choose & Explain

Pick the best option. Say: 'I chose this because...'

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🪞 Reflect

Was your reasoning solid? What would you do differently next time?

Key Points

Master understanding exponential money growth

Apply financial & real life thinking in real situations

Build habits of financial & real life thinking

Key Vocabulary

Compare

Finding what's the same and different

Predict

Guessing what will happen using clues

Analyze

Looking at something carefully to understand it

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Why This Matters in Real Life

Understanding needs vs. wants helps your family make good spending decisions. It's the same skill businesses use to make budgets.

Talk About It

Discuss these questions with a friend, parent, or classmate.

1How could you use understanding exponential money growth outside of school this week?
2What would happen if everyone was really good at this skill?
3What question do you still have? Write it down and try to find the answer.

Check Your Understanding

Question 1

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What is the main idea of understanding exponential money growth?