At M.I.T., Large Lectures Are Going the Way of the Blackboard 18 years ago
blackboards are much better:
* easier to erase
* easier to clean board and erasers
* chalk is cleaner, cheaper, more expressive, less wasteful (no plastic), and there are generally more colors available
* chalk stays at full "marking capacity" until it runs out. Dry-erase markers make you write at less than full contrast for a long while until you toss them.
* chalk dust is no problem if you have windows you can open a little
* sounds better when you use it. :)
* nicer light-on-dark contrast (IMO)
But whiteboard gets chosen by non-experts b/c it supposedly makes less dust for electronics/projectors. Unfortunate.