I'm probably coming in well too late, but I listened to a great lecture and saw the accompanying powerpoints, where (obviously well timed in advance) at the right moment a relevant key word or concept appeared on the screen just as it was said. (Lawrence Lessig)
I found it through a link on slate.com about how Powerpoint sux - and this was given as an example of great it could be. It was absolutely fascinating even though I'm not a law student.
article:
http://www.slate.com/id/2253050/
on page 2. is the presentation by Professor Lawrence Lessig
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