<p>RSI attendees (at least, domestic students) are supposed to be 1 year away from college, meaning that students attend RSI during the summer between their junior and senior years of high school unless they are planning to graduate high school early. Thus, pretty much everyone is 16 or 17, though a few of the international students coming from different school system structures are 18 or 19. There are occasionally students (domestic or international) who are younger than 16, but that is a rarity.</p>