Columbia subject headings:
Educational change--Germany.
Educational technology--Germany.
Mass media in education--Germany.
Mass media--Germany.
Study and teaching--Germany.
Harvard subject headings:
Educational change--Germany
Educational technology--Germany.
Germany--Study and teaching.
Mass media in education--Germany.
Mass media--Germany
Princeton subject headings:
Educational change--Germany.
Educational technology--Germany.
Germany--Study and teaching.
Mass media in education--Germany.
Mass media--Germany.