One approach you could take is to create a video documentary that briefly reviews the history of ethics, from the early Greek philosophers to modern scholars. You will need access to a camcorder. In addition, if you will be speaking on camera, you will probably need to get the assistance of another student who is familiar with camera equipment and lighting.
Write a paper based on case study interviews of people who have had to make ethical decisions. For example, you could interview people in prison to get their views on ethics. For the opposite perspective, you could interview police officers. Both might yield surprising results. Alternatively, you could interview highly successful people to get their views on ethical behavior to compare and contrast it with the views of middle- or lower-class people.
Create a questionnaire that asks people questions based on hypothetical situations. For example, you could have one question that asks about returning money you have found in a church. Later in the questionnaire, you could have a similar question that asks about returning money you found in a supermarket. The results from these two questions could help you draw conclusions about the extent to which religion influences ethical behavior.
Another way to examine ethics at work is to set up a hidden camera near a cafe table and place a wallet on the table. Film passersby to see who ignores the wallet, who takes it to management and who pockets it. After having done this a sufficient amount of time to get an accurate sample, you can create a graph based on the results.