This is an interesting thread, so hope to stay on topic….
Boarding schools have an interesting dynamic, not only because you have a community of students from around the US and the world, but also because you are living with them 24/7.
I believe there are many opportunities to dive into political conversations and hear a variety of perspectives - including those from students on the other side of the globe. I do think that students also realize that they are living with a roommate or on a floor where comments could have wider implications compared to statements at a local high school. You can’t just go home and leave it behind for the day. Students realize this. You might, at 14 years old, have a roommate that is totally on the other end of blue-red color palate. At some schools, you have the chance to have formal sit downs and hear many political points of view. Because you are part of a community living with each other at boarding school, I do think there is more opportunity to discuss and debate outside of a formal classroom setting.
Cheers,
UAG
UAA
UGA
(If you get this, you are brilliant - not colleges 
)