Columbia subject headings:
Harvard subject headings:
Educational technology
French language--Study and teaching (Secondary)--Audio-visual aids.
German language--Study and teaching (Secondary)--Audio-visual aids.
Princeton subject headings:
Audio-lingual method (Language teaching)
French language--Study and teaching--Audio-visual aids.
German language--Study and teaching--Audio-visual aids.
Language and languages--Study and teaching--Audio-visual aids.
Virtual reality in education.