Since the 80s, physics education research (PER) has suggested that students gain and retain physics knowledge better in an interactive environment. While this research has mainly focused on large first-year courses, more recent work shows that interactive teaching techniques are impactful in upper-level courses as well. I will discuss interactive techniques that can be incorporated without excessive time and effort, using Physics 256: Intro to Quantum Physics as a case study. Before the talk, please take a short, anonymous quiz to help shape this discussion: http://uoft.me/PERtalk