First, let me say that there's a huge difference between teaching presentations (presenting material that students will need to use and be tested on later) and idea pitching or research presentations (where you want people to leave with a general idea and a pointer to the material).
My algorithms professor wrote out the whole outline of the presentation, then would do the whole thing on the board as he went. I loved it.
That said, powerpoints have a very worthwhile benefit in that redistribution is trivial. If you're fortunate enough to be in an Operating Systems course where you're writing an operating system, there's a large amount of stuff where details are very important that can get screwed up when twice-transcribed. Something like a powerpoint is invaluable.
I think the best presenters use both powerpoints (for main ideas) and a (chalk|white)board, for actually working through it.
My algorithms professor wrote out the whole outline of the presentation, then would do the whole thing on the board as he went. I loved it.
That said, powerpoints have a very worthwhile benefit in that redistribution is trivial. If you're fortunate enough to be in an Operating Systems course where you're writing an operating system, there's a large amount of stuff where details are very important that can get screwed up when twice-transcribed. Something like a powerpoint is invaluable.
I think the best presenters use both powerpoints (for main ideas) and a (chalk|white)board, for actually working through it.