Consumer behavior is covered in problem sets 28 through 32. Set 28 has a particularly interesting trick that allows students to manually rotate a utility function to see indifference curves and total utility curves. Income and substitution effects are handled in set 31. Present value and the internal rate of return are done in sets 33 and 34. There's a bunch of examples from lotteries to business investment.
Students get a chance to evaluate the rate of return on their own college education.
Consumer and producer surplus are developed in sets 7 through 9. There are applications to taxes and international trade. These are particularly good if you use the Mankiw text. Externalities get a brief treatment in set 10. Production possibility curves are handled in a basic way in set 1.