The Faculty (1998)

Many teens think their teachers hail from another planet -- but what if it's true? Herrington High students notice that faculty members Furlong (Jon Stewart), Miss Burke (Famke Janssen), Principal Drake (Bebe Neuwirth) and aren't quite themselves. The students discover an alien infection but might not be able to stop it in director Robert Rodriguez's sci-fi thriller, a blend of teenage angst, cutting-edge comedy, and eye-popping effects.