This case study uses evidence collected for accreditation and programme improvement at a small university Master's and certification programme in Educational Leadership Development to describe efforts to help leadership candidates use data during the programme's final internship experience. Programme features supporting the growth of candidates' instructional leadership skills are discussed as are the challenges faculty encountered supporting leadership candidates' efforts to use data to lead change projects. Suggestions for evaluating programmes' ability to teach evidence-based leadership practice are offered at the paper's conclusion.