The easiest way to do this is with real or hypothetical examples. Provide a scenario in which there are ethical implications and trace the series of steps and missteps along the way that lead to ethical and unethical behavior. There are so many examples in the news today. You might discuss Bernie Madoff or the Bangladesh garment factory tragedy. Presently, companies are being asked to sign a voluntary agreement to help ensure that working conditions amongst their third world suppliers are safer. Some companies are declining to enter into this agreement, stating they have their own internal means of doing this. You might discuss whether or not such a company is capable of making ethical decisions internally, or whether or not it is ever ethical to self-police, either for one company, or industry-wide.