The concept of data-driven professional development is both straight-forward and sensible. Implementing this approach is another story, which is why many administrators are turning to sophisticated tools to help manage data collection and analysis. These tools allow educators to assess and correlate student outcomes, instructional methods, and state standards--information that can then be used to select appropriate professional development opportunities based on teachers' real needs. In this article, the author presents the stories of three district administrators who are using data-driven methods and technologies to plan professional development programs, improve instruction, and augment student achievement.