It's like high school holds two different worlds, revolving around each other an never touching; the haves and the have-nots. I guess it's a good thing. High school is supposed to prepare you for the real world, after all.
My first job when I got my equity card was acting in 14 plays back-to-back. Playing that many roles, you look for ways of differentiating the characters physically, which goes hand in hand with understanding them psychologically.