Economics Interactive Tutorial Provides tutoring on production costs, supply and demand, elasticity, monopoly and risk aversion.  Found by Malka Faershtein.    Cybereconomics This is an on-line textbook covering both micro and macroeconomics.  It includes some topics covered in Economics 310 and also many topics covered in Economics 160 and 161.   Game Theory Page  Professor David Levine's game theory page.  Towards the bottom of the page there are links to games you can play against the computer, but I haven't tried them yet.     Teach Me Finance A good page if you are taking a finance class.  Found by David Rowland.