Pop quiz: Who’s responsible for the attacks of 9-11? If you said the United States, you’re well qualified to teach American students about the defining historical event of their lives. That, at least, is the conclusion reached by Dickinson College. This September, in a bid to resolve the lingering dilemma over how best to broach with students the subject of the attacks, and terrorism generally, the Carlisle, Pa-based college sponsored a contest. Together with the Smithsonian Institution, the college invited educators across the country to submit lesson plans proposing creative ways to teach the subject of September 11. The four...