The journal Teaching of Psychology (a journal of the American Psychological Association, Division 2) has a number of class demonstrations and activities relevant to teaching personality psychology. Here is a bibliography of some recent articles. (The articles are copyrighted by the journal, and to obtain them you must either write the authors for a reprint, or use your college or university library to obtain a copy of the journal).
Nier, J. A. (2004). Why Does the "Above Average Effect" Exist? Demonstrating Idiosyncratic Trait Definition. Teaching of Psychology, 31, 53-54.
Boyce, T. E., Geller, E. S. (2002). Using the Barnum effect to teach psychological research methods. Teaching of Psychology, 29, 316-318.
Paddock, J. R., Terranova, S., Giles, L. (2001). SASB goes Hollywood: Teaching personality theories through movies. Teaching of Psychology, 28, 117-120.
Gifford, L. A., & Lipsitz, A. (2003). What's in a name? Better letters if it's mine! Teaching of Psychology, 30, 58-59.
Dollinger, S. J. (2004). Predicting Personality-Behavior Relations: A Teaching Activity. Teaching of Psychology, 31, 48-51.
Herringer, L. G. (2000). The two captains: A research exercise using Star Trek. Teaching of Psychology, 27 (1), 50-51.