Twelfth Grade · History · week 34

Personal finance II: credit & debt

Use credit deliberately — scores, interest math, and the difference between tool-debt and trap-debt.

Credit is renting money. Rented well, it's a tool: a mortgage buys a home decades before cash could; a credit card, paid in full monthly, builds the score cheap housing and loans later require. Rented badly, it's a trap: carry a card balance at ~24% APR and the minimum payment barely dents the principal — a $2,000 balance at minimums can take a decade-plus and cost thousands extra.

Your credit score (~300–850) is your rented-money résumé: payment history and utilization dominate it. The playbook is short: pay every bill on time, every time; keep balances small relative to limits; start building history early with a card you treat like a debit card. And sort every borrowing decision into tool vs trap BEFORE signing: does this debt buy an appreciating asset or capability — or does it finance a want that will be gone before the payments are?

📋 For the grown-up teacher
Teach it (10–15 min):
  • Walk the $2,000 trap table line by line — dread, then relief at the paid-in-full row. That contrast is the lesson.
  • Pull a real card offer (mail/online): find the APR, minimum formula, and late-fee fine print together.
  • Tell one real credit story from your life — either polarity. It will outlast every chart.
  • Set their starting playbook now: first card at 18, autopay in full, utilization under ~30%, never a payday loan.
Talk about it:
  • When is borrowing wise?
  • Why do lenders love minimum payers?
  • What's your rule for the first credit card?

Mastery looks like: They compute carried-interest costs, explain the score levers, and sort debts tool-vs-trap with reasons.

Common stumbles: Fearing all credit (no history = expensive later); or normalizing balances because "everyone carries one."

Homework for this lessonType it, write it with a stylus, or print it for pencil & paper.open →
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