Non-economists, in particular, might find this useful. It is an intro lecture to an environment economics class in UC Berkely outlining the 'ten principles' of Economics, a pedagogical tool drawing on Mankiw's textbook and used in universities all over the world. There is some debate at present as to whether this approach should face more competition (see e.g. recent debate around walk-out from Greg Mankiw's class). Mankiw's ten principles are written down here.