This article reviews stock-trading simulations as a resource for use in management courses. Stock-trading simulations have three highly desirable qualities for educators: (1) they cost nothing to use--instructors can choose from various free simulators that all have the same general functionality, (2) they provide real and continuously updating data (e.g., company news, stock price movements), and (3) they can be customized to enhance learning. Feedback from experience, colleagues, and students confirms that all stock-trading simulations can indirectly enrich learning in courses, such as principles of management and strategy, by compelling students to follow and analyze the decisions of corporate managers. Stock-trading simulations also provide opportunities for students in courses covering managerial decision making to directly analyze and learn from their own decisions when they trade virtual shares of companies. The review concludes with a summary of the potential strengths and limitations management instructors should consider before implementing stock-trading simulations.