[MarcScott]

Although I use video instruction occasionally in my own lessons, it is not a solution. It is a one-shoe fits all approach. The talent of a teacher is to be able to engage learners of all ability ranges and adapt their lessons according to the progress made by individual students. Software can't do this (yet).

[robbiemitchell]

Actually, it can, at least in part: http://www.knewton.com (my employer)

[ironchef]

Agreed. The khan academy and similar solutions are good for pupils who are engaged and will act as their own advocates; however, a significant number don't respond as well to that currently.