In this lesson, students find out how much money NFL cornerback Patrick Peterson lost by not cashing his signing bonus check of over $15 million. Students start by guessing how much money he could have earned in interest if he had cashed the check right away. Then students are asked what information they need to know in order to solve the problem. A news article is given with extra information, and the equation for compound interest is used. Extension ideas are given to determine what the amount of money made would be for different amounts of time as well as a Desmos graphing exploration where students can change the rate and explore the amount of money that could be earned at different rates.