| 21. | Instruction in spoken language is not conducted sufficiently and is not reinforced by teaching aids.
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| 22. | The hand-held device is also commonly used as a teaching aid to highlight lecture material.
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| 23. | Moreover, the teachers are usually those unqualified with few teaching aids and poor textbook provision.
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| 24. | Or they may have been teaching aids, or even toys, for children, according to Sinclair.
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| 25. | WPA programs also supplied clothing, and canneries were used as teaching aids and product generation.
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| 26. | The theater troupe toured venues throughout California, including jails and juvenile halls, teaching AIDS education.
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| 27. | On 5 October 2005, one A-4SU Skyhawk was delivered to Singapore Polytechnic as a teaching aid.
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| 28. | OpenStat and Instat were developed as teaching aids.
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| 29. | The museum is regularly used by schools, colleges and adult education groups as a teaching aid.
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| 30. | He designed prototypes of functional and art objects as teaching aids and taught woodworking in Tegucigalpa.
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