Classical Charter Schools serves kindergarten through 8th grade students in the South Bronx and is one of the three highest-performing charter school networks in New York City. Students attending Classical schools have outperformed State, City, and District school students since its inception in 2006: on the 2016-17 state tests, 89% of Classical students passed the ELA exam and 95% passed the math exam compared to a 47% and 43% New York City pass rate, respectively. We funded a catalytic effort to create an open source data technology system that can be shared with other school networks. The data tool, developed over a three-year period with our support, houses granular student-level academic, behavioral, and attendance data in one place which allows teachers, coaches, and deans to work together to identify conditions that might put a student at academic risk, thus allowing for early intervention. Our support is helping Classical transition from measuring performance and tracking these data points in separate silos (academic, behavioral, demographic, attendance) to managing information and results across these areas. Our grants required that Classical make its data systems technology open source so that other schools can learn from the tools.