Functions of money lesson plan high school economics with guided notes, Bitcoin vs barter sorting activity, Google Forms quiz, exit ticket, and answer keys. Students walk in knowing money as something in their pocket and leave with the three-function test — medium of exchange, store of value, unit of account — and can use it to argue whether Bitcoin, Venmo balances, gift cards, or gold actually qualify. The barter-to-Bitcoin arc gives the abstract framework a clear story arc that holds attention