Minecraft
Preparation
Lesson Narrative
In this lesson, students explore the math and mechanics of savings vehicles, specifically High-Yield Savings Accounts (HYSAs) and Certificates of Deposit (CDs). Students will calculate the trade-off between higher interest rates and liquidity (the ability to access cash without penalty). By the end of the lesson, students will be able to recommend the correct savings vehicle based on a consumer's specific timeline and financial goals.
Learning Goals
• Compare and contrast traditional savings, High-Yield Savings Accounts (HYSAs), and Certificates of Deposit (CDs).
• Calculate the financial penalty for breaking a CD early versus the gained interest of holding it to maturity.
• Evaluate the concept of "liquidity" and how it dictates where to park short-term vs. medium-term cash.
Student Facing Learning Goals
• Let's figure out how to make our saved money grow faster without locking it away when we might need it.
Student Facing Learning Targets
• I can explain the difference between a high-yield savings account and a CD.
• I can calculate the true cost of withdrawing money from a CD early.
• I can choose the right savings account based on when I actually need to spend the money.
Required Academic Standards
National Jump$tart Standards:
• Saving and Investing (Standard 1): Compare how saving and investing build wealth and help meet financial goals.
Glossary Entries
High-Yield Savings Account (HYSA): A savings account that pays a significantly higher interest rate than a traditional savings account, usually offered by online banks.
Certificate of Deposit (CD): A savings vehicle that holds a fixed amount of money for a fixed period of time (term) in exchange for a premium interest rate.
Liquidity: How quickly and easily you can convert an asset into cash without losing value.
Early Withdrawal Penalty: A fee charged if you take money out of a CD before the agreed-upon term ends.
Lesson
Warm Up
2.3.1: The Time Machine
Launch: Have students stand in randomized groups of 3 at vertical whiteboards. Present the prompt verbally or project it. Give them 4 minutes to write their answers.
Synthesis: Select two groups to share. Establish the baseline: The highest interest rate isn't always the best choice if you need the money for an emergency. Introduce the term "Liquidity."
Student Facing Task
You have $5,000. Bank A will pay you 1% interest and let you take the money out tomorrow. Bank B will pay you 5% interest, but you legally cannot touch the money for exactly 12 months without paying a massive fine. Which do you choose and what is the deciding factor?
Activity 1
2.3.2: The Cost of Liquidity
Launch: Keep students at their whiteboards. Project the banking data. Give groups 8 minutes to run the math.
Synthesis: Have the class observe the boards. (Teacher Key: Traditional = $10. HYSA = $400. CD = $550). Ask: "Why did the local bank pay $150 more than the online bank?" Explain that you get paid a premium for giving up your "liquidity." The bank wants a guarantee you won't ask for the money back so they can safely loan it out for a year.
Student Facing Task
Calculate the 1-year earnings for a $10,000 deposit across three different savings vehicles. (Use simple interest: Balance × APY).
• Traditional Savings: 0.1% APY. High liquidity (instant access).
• HYSA (Online): 4.0% APY. High liquidity (takes 2-3 days to transfer).
• 12-Month CD: 5.5% APY. Zero liquidity (Locked for 1 year).
1. How much interest is earned in the Traditional Savings?
2. How much interest is earned in the HYSA?
3. How much interest is earned in the CD if left untouched?
Activity 2
2.3.3: The Broken Contract (CD Penalty)
Launch: Present the scenario. Give the whiteboard groups 8 minutes to calculate the penalty math.
Synthesis: Facilitate a class debate. (Key: Monthly interest = $550 / 12 = $45.83. Penalty = $45.83 x 3 = $137.49. Earned in 6 months = $275. Net after penalty = $137.51). Ask: "If they just used the HYSA for 6 months (4% of $10k / 2), they would have made $200 with zero penalties. Why are CDs terrible for emergency funds?" (Answer: Because true emergencies are unpredictable, and penalties destroy your yield).
Student Facing Task
Life happens. Six months into the 12-Month CD, the car breaks down and the $10,000 must be withdrawn to pay the mechanic. The penalty for breaking the CD is "3 months of interest."
1. Based on your Activity 1 math, divide the total CD yearly interest by 12 to find the monthly interest.
2. Calculate the dollar amount of the penalty (3 months of interest).
3. If the money sat there for 6 months, how much interest did it actually earn before the penalty?
4. Subtract the penalty from the 6-month interest. How much did they actually make?
Lesson Synthesis
Lesson Synthesis (5 min)
Narrative: Bring the class back to their seats. Review the student-facing learning targets. Ask the class to summarize the ultimate rule of savings vehicles: "If you might need the money tomorrow, where does it go? If you know you don't need the money for 2 years, where does it go?" (Answer: Emergency cash goes in a HYSA for liquidity; planned future purchases go in a CD for yield).
Cool Down
2.3.4: Matching the Vehicle
Narrative: This exit ticket serves as a formative assessment to ensure students can match the correct banking product to human behavior based on liquidity needs.
Teacher Rubric: A successful response must assign the HYSA to the emergency fund (because medical bills are unpredictable and require high liquidity) and the CD to the house downpayment (because the timeline is fixed and the money won't be needed before the 2 years is up).
Student Facing Task
No cool down task.