<p>It’s really impossible to “chance” people for RSI. There are tons of amazing people who get rejected. Just put down everything you have for your science and math classes, any extracurriculars, and competitions. There’s no use in worrying about those–most of them are already done, and can’t be changed. What you can change, however, is the impression you make with your essays. I really think that the essays are the distinguishing factor. You want to show that you have a lot of passion for science/math, and that you have some idea of what you want to do. They’re looking for people with potential, I think. Good luck!</p>