When the 16 Race to the Top-District (RTT-D) victors were announced in December 2012, US Secretary of Education Arne Duncan proclaimed, "Now these winners can empower their school leaders to pursue innovative ideas where they have the greatest impact: the classroom." He backed up his statement with nearly $400 million in awards to be spent over the next four years to demonstrate how the districts could personalize education for each student in their schools, one of the core goals of RTT-D. In this article, the author describes how two winning districts--Lindsay Unified in California's Central Valley and Charleston County in South Carolina--are using their RTT-D awards to improve data tracking and build the foundation for personalized teaching and learning.