<p>Andover and Exeter would typically send around 25%-30% of the class to Ivies. There are a handful (but only a handful) of prep schools around the country with comparable or higher percentages, but I believe all of them have smaller class sizes (Andover and Exeter are in the 300 range). All these schools also have lots of kids who go on to top non-Ivy colleges (Stanford, MIT, Duke, Chicago, top LACs etc.) Presumably MomofaKnight’s son is at one of them (I’m guessing Roxbury Latin or Milton). And yes, these schools are generally quite well known to the colleges.</p>