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Unit 6

Lesson 5

Life & Disability Insurance: Term vs. Whole Life Mathematics

Last Updated: 5/18/2026
Preparation
Prep
Lesson Narrative

Students analyze the mathematics of life and disability insurance. They will calculate how disability insurance protects a worker's most valuable asset (their future income) and compare the high premiums of Whole Life insurance against the cost-effectiveness of Term Life insurance, proving the "Buy Term and Invest the Rest" wealth strategy.

Learning Goals

• Differentiate between Term Life and Whole Life insurance structures.


• Calculate the opportunity cost of high Whole Life premiums compared to index fund investing.


• Evaluate the necessity of short-term and long-term disability insurance for protecting lifetime income.

Student Facing Lesson Objective

• Let's calculate the cheapest way to protect our families if we pass away, and how to protect our paychecks if we get injured.

Student Facing Learning Targets ("I Can" Statements)

• I can explain why Term Life is usually a better financial choice than Whole Life insurance.


• I can calculate the income replaced by disability insurance.


• I understand what my biggest financial asset actually is.

Required Academic Standards

National Jump$tart Standards:


• Risk Management and Insurance (Standard 1): Determine how to manage risk and protect against financial loss.

Glossary Entries

Term Life Insurance: A policy that provides coverage for a specific period of time (e.g., 20 years) and pays out only if the insured dies during that term.


Whole Life Insurance: A permanent policy that covers the insured for their entire life and includes a savings component (cash value), but charges massive premiums.


Beneficiary: The person designated to receive the financial payout from a life insurance policy.


Disability Insurance: A policy that pays a percentage of a worker's income if they are injured or ill and cannot work.


Income Protection: The concept of using insurance to guarantee a stream of cash flow if your physical ability to labor is compromised.

Lesson
Lesson
Warm Up
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6.5.1: The Million Dollar Asset / Turn & Talk


Launch: Pair students up to discuss the prompt.


Synthesis: Select two pairs to share. Establish the baseline: A young person's most valuable asset isn't their car or their savings account; it is their ability to earn a paycheck for the next 40 years.

Student Facing Task

Student-Facing Task: Turn and Talk with your partner. If you make $50,000 a year from age 25 to age 65, you will earn a total of $2,000,000 in your lifetime.


1. If you get into an accident tomorrow and can never physically work again, what happens to that $2,000,000?


2. What is mathematically the most valuable asset you own right now?

Activity 1

6.5.2: Disability Income Math


Launch: Keep students at whiteboards. Project the disability scenario. Give groups 8 minutes to run the calculations.


Synthesis: Have the class observe the boards. (Teacher Key: 60% of $4,000 = $2,400/month. They are short $1,600 compared to their old income). Emphasize that long-term disability is critical, but it rarely replaces 100% of income, making an emergency fund essential.

Student Facing Task

Student-Facing Task: A worker takes home $4,000 a month in income. They suffer a severe back injury and go on Long-Term Disability. The insurance policy pays 60% of their normal income while they recover.


1. Calculate their new monthly income from the insurance company.


2. If their monthly bills (rent, food, car) cost $3,000, are they financially secure while recovering?

Activity 2

6.5.3: Term vs. Whole Life Math


Launch: Present the premium comparison. Give the whiteboard groups 10 minutes to calculate the opportunity cost.


Synthesis: Facilitate a class debate. (Key: Difference is $225/month. Over 30 years, investing that $225 builds massive wealth, far outpacing the poor returns of Whole Life). Teach the golden rule of insurance: Insurance is for risk transfer; the stock market is for wealth building. Never mix the two.

Student Facing Task

Student-Facing Task: You want $500,000 of life insurance to protect your family.


• Option A (Term Life): Costs $25 a month for a 30-year term. If you don't die in 30 years, it expires.


• Option B (Whole Life): Costs $250 a month for your entire life, but builds a small "cash value" savings account inside it.


1. Calculate the exact dollar difference in the monthly premium between Option A and Option B.


2. "Buy Term and Invest the Rest" is a famous strategy. If you choose Option A, and invest that extra cash difference into an S&P 500 Index Fund every month for 30 years, why will you likely end up vastly wealthier than if you chose Option B?

Lesson Synthesis

Lesson Synthesis (5 min)


Narrative: Bring the class back to their seats. Review the student-facing learning targets. Summarize: "Protect your income with disability insurance while you are young. Buy cheap Term Life insurance to protect your dependents, and invest the savings so you become 'self-insured' later in life."

Cool Down

6.5.4: The Dependency Test


Narrative: This exit ticket serves as a formative assessment on the necessity of life insurance. Teacher Rubric: A successful response must state that Person A does not need life insurance because no one relies on their income to survive. Person B absolutely needs life insurance to replace their income so their three children don't become homeless if they pass away.

Student Facing Task

Student-Facing Task: Based on the mathematical purpose of life insurance, who actually needs to buy a policy today: Person A (a single 25-year-old with no kids and no debt) or Person B (a 35-year-old sole breadwinner with three children)? Explain your logic.

Assignments
Materials
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