While students would not conduct this experiment for the IA, this experiment serves as a good example of how specific ethical principles are violated in popular studies. I use Schachter and Singer in the cognitive section of the course to present the ethical issue of deception.
Although it's quite lengthy, the APA site gives detailed explanations of the ethics that are required for psychological research. The information here serves as a good background to the ethics that come up in many of IAs that are students choose.
This site has 50+ documentaries in the psychology section. Much of them deal specifically with the brain, but if you scour the society section, you can find some good sociocultural documentaries. It is also helpful for history classes.
This is a good site to locate research studies not always found in the psychology textbooks. It offers students variety in how they defend their positions.
Mr. Fraser discusses an event where multiple eyewitness to a murder all remembered details of the even incorrectly. It is useful when discussing reconstructed memory in the cognitive section of the course.