Yale law professor Ian Ayres teaches a segment of his American Contract Law course built around Ricketts v. Scothorn, a promissory estoppel case in which a grandfather's promise of money leads his granddaughter to quit her job. Ayres uses the case to introduce how courts enforce promises made without a bargained-for exchange, walking through the reasoning that lets reliance substitute for consideration. The lecture is short and focused, part of a Coursera-linked series, and points viewers to the actual case file for the underlying facts. It works as a compact entry point into the doctrine of promissory estoppel within first-year contract law, showing how a single dispute over foregone employment became a foundational teaching case for enforceable promises.