Why wait until college to study abroad? Quest has programs tailored to high school students in over a dozen countries around the world, where you'll be placed in a local high school and with a local host family!
Think you don't have the time? If you can't go for a full academic year, check out the semester, short-term and summer options. There's an option for various budgets and language levels.
Quest offers inbound programs for middle and high school students coming to study in the U.S. with an F-1 visa, as well as outbound programs in several countries for American high school students.