This Journal of Geoscience Education article discusses a mock trial in which undergraduates serve as expert witnesses and law students serve as their attorneys. The article identifies the trial as an effective vehicle for developing quantitative skills and enhancing written and oral communication skills. The course discussed is unabashedly about applying scientific principles to solve real-world problems. The entire course revolves around the analysis, interpretation, and presentation of scientific data. Educational levels: Graduate or professional, Undergraduate lower division, Undergraduate upper division