Double-Entry Bookkeeping
Also called: double entry accounting, double-entry system
Double-entry bookkeeping records every transaction twice — once as a debit and once as a credit — so the books always balance. It's a 500-year-old error-detection system: if the two sides disagree, something is wrong, and the imbalance points at where. It's also why the balance sheet balances by construction, and why fabricating a single number in a set of accounts requires fabricating a second to match.
Where this is taught
Definitions are the trailer. These free levels turn Double-Entry Bookkeeping into something you play — one bite-size lesson, with worked examples, a quiz and XP.