khanacademy.org Seems like it should be a model for something very like that. In it, a guy named Salman Khan (not the actor) creates 10-minute lectures for free, self-motivated study. You want to learn math? khanacadamy.org will teach you.There's not a reason in the world that Sowell couldn't do the same thing in Economics.
I have used the Khan academy numerous times to educate/brush up on my math, so as to help my sons. INVALUABLE...and so are Dr. Sowells books. I wish it were MANDATORY that all high school seniors had to read ‘Basic Economics’ and ‘Intellectuals and Society’.