In this article, the author talks about program evaluation, a strategy commonly used by instructional leaders that can help school business officials improve their budget process. As districts struggle to develop budgets in these challenging economic times, school business officials might consider turning to program evaluation for help. Program evaluation gives school business officials an opportunity to improve the budgeting process by examining the cost-effectiveness of the district's programs and initiatives. For purposes of this overview, the author discusses four key elements he used to conduct a quantitative evaluation of a class size reduction initiative: (1) literature review; (2) logic model/program theory; (3) data identification, compilation, and testing; and (4) evaluation of results and conclusion. (Contains 1 figure.)