1. Generally Accepted Accounting Principles (GAAP) are the rules and guidelines adopted for recording and reporting business transactions to bring uniformity to financial statements. They are developed by accounting professionals over time based on past practices and experiences. 2. Key accounting concepts that form the basis of GAAP include the business entity concept, money measurement concept, going concern concept, and matching concept. These concepts are fundamental ideas and assumptions underlying accounting theory and practice. 3. Common accounting concepts taught include revenue recognition, consistency, historic cost, and full disclosure to ensure financial reports are meaningful, reliable, and comparable. Adhering to consistent accounting concepts and GAAP allows for orderly and standard preparation of financial statements.