I created the problems in this package to help my principles and intermediate level students in microeconomics at Michigan State University get practice working with the standard models of micro theory. The problems offered on this site can serve an intermediate level course course, but I use a subset of them for my principles course. At MSU we don't ordinarily do consumer behavior, or analysis of isoquants in the principles course. This is very basic stuff, so is good for all students. Production and cost are covered in sets 11 through 17.
Topics vary from very simple to complex.
Problem sets 11 through 13 do production functions and isoquants and go through cost minimization in detail. If you don't do isoquants in your course, use only sets 15 through 17. Set 14 does cost minimization without isoquants. It's an interesting and intuitive approach, and I urge you to try it. Competitive firms and markets are dealt with in sets 18 to 23.