« on: August 18, 2007, 03:52:00 AM »
I'd tend to agree that they're probably a waste of time. In a one hour class, there may only be 10-15 minutes of relevant material. Going back to listen to every class would eat up a lot of time you could spend much more productively. A guy in front of me used one (w/o professor's permission) but never took any class notes. I don't get it. Why would you sit in class and do nothing but record the lecture so you could listen to it again in your "spare" time?
I suppose the argument in favor of using one would be that there may be a subject you don't understand that the professor may address in class. Two arguments against this - first, even if the professor addresses it in class, listening to the discussion again may not help you because class discussion is often more confusing than beneficial and second, even if the discussion would help you, you'd have to spend so much time finding it (or indexing your lectures on digital format) that it wouldn't be worth the time you spend. In my experience, my time was best spent reviewing my notes, preparing outlines, and working practice problems/E&E's with the study group.