This is a presentation I do that helps students understand how two groups of people could be labeled differently for doing the exact same behavior in the exact same place at the exact same time. I use this is both my Race & Nationality course and my Intro to Soc courses.
I usually begin by asking students to think of labels that can positively or negatively affect someone. I follow that up by asking, “how does someone get a label like this? Can they give it to themselves?” This helps draw the social dynamics of labeling theory into the light.