The U.S. State Department funded Congress-Bundestag Youth Exchange Program (CBYX) is for motivated high school students who want to fully immerse themselves in German culture by living with a host family and attending a local high school. No previous language experience is required.
Did not apply for CBYX – need to contact alumni for further tips. See NSLI-Y fbook page for possible CBYX alumni
there are multiple CBYX Facebook pages, here is one of them: https://www.facebook.com/groups/congressbundestag2013/?fref=ts