What are the uses of vcr for educational purpose?

what are the uses of vcr for educational purpose and advantages and disadvantages of the vcr in the process of teaching.

Answer:
Showing people educational videos.

Advantages: Saves lazy or incompetent teachers from having to bother. Gives them more time to have a cigarette.

Disadvantage: Lazy or incompetent teacher has to remember to rewind tape for next class.

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