I've been working on lectures on microeconomics for my AP econ class. I am finished with macro (I hope), although at some point I will put together something on PSST.
Anyway, I was cruising along with micro lectures, getting ready to talk about market failure, public goods, and so on. Looking ahead, I realized I was going to be describing what I call the Great Debate over the government's role in the economy. I wound up preparing a 40-minute lecture on this debate. If you have the time and wish to comment, feel free to do so here.