An article that has something to do with the supply, demand, and price for a scarce resource. Ideally, the economic evaluation should not have been done, yet.
Find an online newspaper (e.g. freep.com) and find an article about the price of gasoline. Shouldn’t be too hard. Then discuss how Saudi Arabia’s break away from OPEC has increased supply while economic hardships have decreased demand.
“Power and Market” by Murray Rothbard contains a nice analysis of how price regulation negatively affects supply and demand. You should look at the triangular intervention chapter. It will certainly be something new to the unaccustomed.