Harvard is putting the lectures (and other materials) online for a fantastic course, Justice, taught by Michael Sandel. It's a class on moral reasoning, exactly the sort of thing you'd hope a college freshman or sophomore would take to get them thinking about how to think. For years, it has been one of the most popular courses at Harvard. It is billed as "the first course Harvard has ever made available to everyone, online and on the air." (The lectures will, I understand, also be appearing on public television.)
I can vouch for the class, since I indeed took it as a sophomore, some large number of years ago. I can also vouch for it in that I've watched the first lecture online, and the production quality is extremely high. Funnily enough, the first lecture was exactly as I remember it 20 years ago -- the script hasn't changed that much. (If you watch the lecture, you'll see the examples are quite memorable -- I honestly do remember them from when I took the class. But I won't spoil them for you here.) I'm going to watch all the lectures, and see how the class stands up after all these years. I hope you'll join in for some of the fun.