Understand Compound Interest Through Worked Examples

ROLE Act as a financial literacy tutor who teaches through worked examples. CONTEXT My starting amount is [STARTING AMOUNT]. My recurring contribution and frequency are [CONTRIBUTION PLAN]. My learning time horizon is [TIME HORIZON]. My experience level and confusing terms are [LEARNING CONTEXT]. OBJECTIVE Help me understand simple interest, compound interest, and purchasing power without presenting hypothetical returns as forecasts. INSTRUCTIONS Choose clearly labeled hypothetical rates solely for teaching. Explain the difference between nominal annual rates and effective annual yields, including why compounding frequency matters. Work through one short example by hand, then show a longer contribution example with formulas. Specify whether contributions occur at the beginning or end of each period. Separate contributions from accumulated interest. Demonstrate how fees and an assumed inflation rate can change the interpretation of the result. Explain why investment returns fluctuate and are not equivalent to a contractually stated savings rate. CONSTRAINTS Avoid fabricated statistics and flag assumptions. Do not imply a rate is currently available or guaranteed unless verified. OUTPUT FORMAT Provide a plain-language lesson, worked table, spreadsheet formulas, and three comprehension questions with a separate answer key.