Boarding Schools characterized as more progressive/liberal

My kid and I visited Cate on a Spring Tour to see if it was an option and neither of us found it “progressive” at all (although I thought it was a great school). @Vermontana, there is a spectrum of what might considered “progressive/liberal” and while I think schools in CA (like Cate) might be considered liberal, that means something very different than “progressive”. Not to be reductive, but I would equate most BS schools to be like Joe Biden and the more progressive schools to be like Bernie/AOC. That being said, it was nice to hear back in 2017 when we toured Groton (for another kid) that the kid who was giving the tour kind of hemmed and hawed when he showed us all the letters from past US Presidents on a wall and I asked if they would hang the incoming president’s letter (I still don’t know bc the tour guide for younger kid didn’t point the letters out and I didn’t want to interrupt). Thus, I think most BS are on the liberal side, but few are truly progressive since it’s such a disruptive way to learn.