I’m trying to translate the term high school into German. However this is proving to be difficult since the school systems in the U.S. are different from Germany. Using Dict.cc and Linguee, I’ve gotten the results
Highschool
Sekundarschule
Oberschule
but I’m not sure which word best describes the typical American high school, i.e., the grades 9–12. Some insight on the best way to translate high school would be helpful.