Lesson

CDs & Share Certificates

9-12th Grades

45 min

Summary

Locking up money on purpose sounds like a bad idea—but it's one of the safest ways to grow your savings. This lesson explores how CDs and share certificates work, which financial institutions offer which product, and when they make sense.

Activities

Bellringer: The Lock Box

Pose the question: Would you agree not to touch your money for 12 months if the bank paid you an extra $50?
Let students consider, then introduce liquidity as a key factor in differentiating accounts.

5 min

Instruction

Define CDs (banks) vs. share certificates (credit unions), early withdrawal penalties, and the liquidity-interest rate relationship.
Walk through the simple interest return formula and contrast simple vs. compound interest.

10 min

Discussion: Timing & Interest Trade-offs

Prompt: If interest rates are rising, is a 5-year CD a good idea or a bad idea?
Follow up: Is compound interest always better than simple interest? Guide students to consider the borrower's perspective.

10 min

Activity: CD Calculator

Students open the Banzai CD calculator and run three set scenarios—varying deposit, rate, and term.
Have them record results and answer: which earned more, doubling the rate or doubling the term?

15 min

Wrap-Up & Assessment

Calculate the return on a $1,000 CD at 4% APY versus a standard savings account at 0.01% APY.
What's the difference between a CD and a Share Certificate?

5 min

Est. Time	Activity	Description
5 min	Bellringer: The Lock Box	Pose the question: Would you agree not to touch your money for 12 months if the bank paid you an extra $50? Let students consider, then introduce liquidity as a key factor in differentiating accounts.
10 min	Instruction	Define CDs (banks) vs. share certificates (credit unions), early withdrawal penalties, and the liquidity-interest rate relationship. Walk through the simple interest return formula and contrast simple vs. compound interest.
10 min	Discussion: Timing & Interest Trade-offs	Prompt: If interest rates are rising, is a 5-year CD a good idea or a bad idea? Follow up: Is compound interest always better than simple interest? Guide students to consider the borrower's perspective.
15 min	Activity: CD Calculator	Students open the Banzai CD calculator and run three set scenarios—varying deposit, rate, and term. Have them record results and answer: which earned more, doubling the rate or doubling the term?
5 min	Wrap-Up & Assessment	Calculate the return on a $1,000 CD at 4% APY versus a standard savings account at 0.01% APY. What's the difference between a CD and a Share Certificate?

Lesson Prep

CD Calculator

Learn how a certificate of deposit (CD) works and use our calculator to estimate how much your savings can grow with a fixed interest rate over time.

CD Calculator

Learn how a certificate of deposit (CD) works and use our calculator to estimate how much your savings can grow with a fixed interest rate over time.

Article

2 min

Class Presentation

Includes a 19-slide deck with teacher notes. Present from Banzai, download a PDF, or copy it to Google Slides.

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Teacher NotesSlide-by-slide guidance, printable as one handout

Unit 5: Banking

Automation & Security

Your bank account is only as safe as your weakest habit. This lesson covers automation tools like direct deposit, split deposits, and recurring transfers—plus security essentials including MFA, social engineering, peer-to-peer risks, and WiFi dangers.

9-12th Grades

45 Min

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