Assess ability to design a randomized controlled trial to evaluate peer instruction in large-enrollment undergraduate STEM courses: define research question and hypotheses; choose randomization unit and justify sample size/power calculations (include assumed effect sizes, intra-class correlation, alpha, and target power); specify primary and secondary outcomes and measurement timing; outline procedures to ensure and measure implementation fidelity (training, observation protocols, adherence metrics); present an analysis plan addressing clustering, intention-to-treat, missing data, and pre-specified equity-focused subgroup analyses (e.g., race/ethnicity, gender, first-generation status, prior achievement) with multiplicity control and minimum detectable effects for subgroups; and discuss ethical, logistical, and feasibility considerations for large-class implementation.