A Series of Tubes

I’ve been listening to some lectures from The Teaching Company.  Some of them are really good and some of them are ok.  I really liked the philosophy of freedom lectures.  Currently I’m listening to ethics and public policy, but the lecturer simply poses a bunch of hypothetical questions and I think has discussion sessions inbetween lectures.  As a teaching sytle that is fine except I’m listening to the lectures on my bus rides to and from campus.