I told someone earlier today that I don't miss academia, but I do miss teaching. Upon reflection, though, that's not quite true. The ache I feel when I think about my experiences as a prof is the same ache I feel when I listen to a song that has a great chorus but lousy verses, or watch Return of the Jedi. It's the ache of fumbled opportunity, the feeling that this could have been great—really great—if only it had been done right. And I wonder if that's what really drives some of the people who are trying to reinvent education today. What they really want, deep down, is a clean slate; the web and everything else is just their cover story.