^^^ Yes, Catholic high schools would comprise another set I’d like to consider.
Notre Dame was another US News T20 (besides Caltech) that does not show up too high in my elite prep matriculation count. I don’t have the data in front of me now, but as I recall it was pretty far down in the count. Georgetown did better.
I don’t think Philly/DC would be too different. My own kids went to Quaker high schools in that region. I did not pay too much attention at the time to where their classmates were going, but in retrospect, I think LACs were at least as popular there as they appear to be at the elite 10 I’ve surveyed.
Sidwell might be different, but I cannot find numbers for it.
For Westtown 2015, the only colleges for which I see multiple matriculations are LACs (including Harvey Mudd) and universities in PA. Nearby UPenn, nearby Princeton, and Brown are the only Ivies.
Scattergood (Iowa) does not show matriculation numbers, just a list. I see one Ivy (Cornell). The only other T20 national universities in bold (which I assume means multiple matriculations) are UChicago, ND, and WUSTL (all midwestern schools). No Stanford, no Duke … no Michigan (but Wisconsin is in bold). Lots of LACs (including Haverford, BMC, College of the Atlantic, Earlham, Grinnell, Gullford, Macalester, MoHo, Reed, Smith, and Wheaton College.) However, Scattergood’s average SATs are 1420 - 1850, which is lower than the averages at some elite boarding schools like Exeter or Andover.
I’d like to focus on “top” high schools. If I venture too far from the Business Insider T25 list, I’m afraid I’m not getting the kind of demographic I want: high-scoring, well-informed kids who are not too bound by money or geography. In other words, I want a sample of HS students many of whom could go almost anywhere they want. I’d like to think their choices offer one interesting representation of America’s “best” (or at least, most prestigious) colleges (as a counterpoint to the US News PA scores or overall ranking.)
I’d love to see UChicago Lab School matriculations, but cannot find them.
UChicago lab school seniors have very high average test scores (pushing 700 in every SAT section, I think). Presumably they are well informed about colleges … and are somewhat removed (geographically at least) from East Coast bias. However, they may be more constrained by money than kids at, say, the St. Grottelsex schools (which would comprise another interesting set.)