The university as closed world
The campus is a machine for producing a particular kind of human being, and campus fiction works when the novel understands the machine well enough to show how it operates on its characters. What does this institution select for? What behaviors does it reward and punish? What version of success does it hold up to its students and faculty? The answers are always specific: a research university running on grant money is a different machine from a liberal arts college running on tuition and reputation. Building the campus as a world means understanding its economy, its hierarchy, its myths about itself, and the gap between those myths and the way it actually functions. The reader should feel, by the end of the novel, that they have been inside a specific institution.