While it's a sometimes painful presentation, David Mamet's 'Oleanna' looks at the 'PC' mindset on campuses in the 80s and 90s (although shown through Mamet's somewhat misogynistic filter). It centers around two meetings between a professor and a female student failing his class. In the first, he tries to get her to understand some of the theory about power and relationships in the course material. While doing so, he says some things that could be taken in multiple ways. In the second, she's slapped him with a sexual harassment charge and the two battle over what was said, what was meant, and what it all means.
Both have motives - within scenes and between scenes - that are not always clear, but do get into the very tricky issues of authority, power, responsibility and more in education.
Sorry for the review - good luck finding a film!