Budding explorers and imperialists!
I am discovering that the best way to sniff out the overachieving students in my classes is to assign a map quiz. I gave them a study guide last week with a list of about 30 locations and then picked 15 of those for the quiz yesterday. The overachievers finished early, of course, and then filled in the places that I did not choose to test them on. I never promised extra credit for that; I will assume that they are psychologically incapable of leaving parts of a map blank.