Digital Textbooks (part 2)

Just saw this from Newsweek by following a link from @ShellTerrell on Twitter - it sums up a little of what I was writing about in a couple of days ago in a previous post when schools consider whether to buy paper or digital textbooks.  (Probably best to click on the image or the link to be able to read in full size)

Update:  I have just read this great article in Edutopia that explains how quickly open source textbooks update compared with print ones -  definitely worth a read.