In an effort to promote learning in classrooms, political science instructors are increasingly turning to interactive teaching strategies--experiments, simulations, etc.--that supplement traditional lecture formats. In this article, I advocate the use of student-generated data as a powerful teaching tool that can be used in a variety of ways to support learning. The "data-driven classroom" is one in which original student data are collected via survey at the beginning of the course and the results presented throughout the term. Examples and case studies across multiple courses and classroom settings are used to illustrate how the method may be applied in practice. Feedback from student assessment surveys reveals strong support for the method, even among nonmajors. The article concludes with recommendations for instructors interested in creating more data-driven classrooms.