Neal Stephanson's "The Diamond age (or: A Young Lady's Illustrated
Primer)" has interesting things to say about such a device, and is fun
SF, besides.

Daniel Vainsencher

"Richard A. O'Keefe" <ok at atlas.otago.ac.nz> wrote:
> 
> 	Well, I was thinking more along the lines of Roboteacher :o) where anyone
> 	can download the program over the web and get a good solid education in
> 	literacy and grammar just as the well educated people get.
> 	
> Is this something that exists?  Where can I read more about it?