<p>Generally speaking, I don’t think attending boarding schools would hurt anyone’s chances at Ivy Leagues. The most competitive boarding schools send at least 5+ kids to each of the Ivy Leagues annually. But to do well on the college admissions process, you need to be at least in the top 25% of your class (normally) which, in a boarding school environment, is extremely hard since most of your classmates are just as motivated, intelligent, well rounded, and talented (and in some cases–have connections to lots of great colleges) as you are. As long as you do very well in your boarding school, you will basically get into a very good school, including Ivy Leagues.
But if you know you will just be an average kid in the middle of your class, I think you’d better off going to a less competitive public school knowing that you’d be the top 3%. This way your chances at Ivy Leagues would be a lottt higher.</p>