I generally use the video of the Stanford Prison Experiment, Quiet Rage, in my sociology and criminology classes. This site would be a good alternative if you don't have the time for the video or access to the video. The slide show captures many of the key incidents in the film, provides enough description for students to undertsand what's going on, and offers video clips from the film to make the effects even more real. The slide show and other parts of the website also provide students with discussion questions and with connections to current and past prison events (Abu Ghraib, Attica, etc.).