Understand how investing actually works — the instruments, the math, and the mistakes — as education, never advice. Asset classes (stocks, bonds, mutual funds, ETFs, and cash) and their risk and return; diversification and why concentrating in one holding is risky; compounding and the rule of 72; index versus active investing and how fees quietly erode returns over decades; dollar-cost averaging; the mechanics of the common accounts (401k, traditional versus Roth IRA, brokerage) — how each works and is taxed, never which one you should pick; bonds and the inverse relationship between price and yield; and the behavioral pitfalls that cost investors the most — trying to time the market, chasing last year’s winners, and panic-selling in a downturn. Many questions have a computed, always-correct answer (future value, the rule of 72, expense-ratio drag, current yield), and every explanation names the classic trap and leaves you a rule. Educational skill practice in how investing works — never personalized investment advice or specific security recommendations.