We describe several of the case studies in the NEOS Guide, a site oil the W
orld Wide Web that contains informational and educational material about op
timization. These studies show how optimization relates to practical applic
ations. They guide the user through relevant details of the application, fo
rmulation, solution. and interpretation of thc results. The studies use int
eractivity to build intuition, allowing users to define their own problems
and examine the corresponding solutions. The studies can Le used fur assign
ments in optimization and operations research courses and as small self-gui
ded units: equivalent to one or two lecture classes.