<p>For schools at the top of your list (Penn, Princeton, Stanford, etc.) you should work on your ACT and try to get at least 34 to really imporve your chances. Being from South Dakota may help you a little bit because I’m going to guess that not many people from SD will be applying to these schools as in some other states. I’m not sure how much of a difference this will really make though. If you think you could handle self-studying an AP or 2 that might also help since your school doesn’t offer them. Your EC’s aren’t too bad and I would say to just keep up with those. I hope I could help a little. Good luck!</p>