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| teaching aids (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. WTNI Alexander Demidov) | |||
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| teaching aids (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. WTNI Alexander Demidov) | |||