This chapter introduces two possible modules that can be used to teach the ethics of authorship to undergraduate and graduate students. The first module introduces the importance of documentation at a level appropriate for lower-level undergraduate students and consists of an interactive lecture and brainstorming session. The second module is a set of two classes introducing the ethical issues affecting authors. It is appropriate for upper-level undergraduates and graduate students, and it consists of a lecture and discussion and a set of case studies. Particular attention is given to those cases related to documentation and the assignment of credit to authors. Both modules have been successfully employed at the University of Pennsylvania.