teaching aid(n = noun.artifact) - materials and equipment used in teaching;
is a kind of equipment
has particulars: audiovisual, audiovisual aid

aid, aid and abet, aid station, audiovisual aid, band aid, economic aid, financial aid, first aid, foreign aid, hearing aid, language teaching, master of arts in teaching, medical aid, mutual aid, teaching, teaching certificate, teaching fellow, teaching method, teaching reading, team teaching