Schools and districts are inundated with data from a variety of sources. As a result, using data to guide instructional planning can be daunting for teachers and schools. While schools and districts are dealing with shrinking budgets and growing demands for high student achievement, an investment in school-based coaching can provide exponential change in a short time. In 2007, Lewisville (Texas) Independent School District introduced school-based data coaches to assist teachers in using data and, as a result, increase student achievement. Instead of relying on outside sources for change, the district instituted change from within through school-based personnel who facilitated conversations about multiple sources of data. District administrators have found the initial investment in secondary school data coaches has fueled teachers' professional learning and growth.