Workforce shortages in the field of science, technology, engineering, and math (STEM) have led to an increasing need for STEM outreach programs for high school students. This article presents an integrated approach to such efforts; government agencies, the host university, and local professional associations play meaningful roles in program design and implementation. This article also evaluates program effectiveness in increasing high school students' likelihood of studying STEM in college. Opening and end-of-program surveys, coupled with demographic data, provided rich information on participants' backgrounds and their responses to STEM exposure and intervention. A discrete choice model discovered participants' differential valuation of program effectiveness and quantified the factors that influenced participants' pursuit of STEM college education due to program participation. In addition to demographics and family culture, overall program experience is critical to the perceived benefits of STEM exposure. Findings can help educators and outreach program directors develop appealing STEM outreach curriculum.