Interactive learning had a positive effect on student learning gains intwo distinct largeintroductoryphysics classes, by two distinct measures: performance on research-validated concept inventories and performance on final exams, including both conceptual and traditional problem-solving questions. The presence or level of interactivity in the classroom had among the largest, if not the largest, predictive strength for student learning among the factors we considered in four different multivariate models, including parents’ education, GPA, and hours studied per week