noun
Etymology: teaching (I)
: printed material (as a picture or map) or other device (as a record player or gyroscope) used by a teacher to fortify or enliven classroom instruction
audio-visual teaching aids
noun
Etymology: teaching (I)
: printed material (as a picture or map) or other device (as a record player or gyroscope) used by a teacher to fortify or enliven classroom instruction
audio-visual teaching aids
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012