This exercise has students pull presidential roles/powers from a word bank, match it with the correct historical event, and then identify the section and clause of the Constitution where it is found (that is, only if it's a formal power- because informal powers are not found there). I included mostly latter 20th century presidential actions, including a couple made by Bush and Obama. After exhaustive research, I included not only the relatively straightforward answer key, but some notes on the more controversial powers- because as we know, some of them can be quite vague! It worked well with my kids. 30 minutes to a period in all.