Technology is very useful in the classroom. However, there should always be a plan B. For example, one of my professors graciously created a powerpoint slideshow for every lecture he gives. He did this so that the students in class wouldn't have to purchase a textbook, because the textbook was expensive. Anyway, one day the projector was not working and he had to cancel class. His teaching style is very beneficial to students, but without a plan B we missed out on being tested on a whole class period's worth of notes.
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