Bad Teacher by TardisIsTheOnlyWaytoTravel. Mr Lehnsherr (formerly known as the super-villain Magneto) is Jean's favourite teacher ever. This is not actually the same thing as being a good teacher.
Status: One-shot. Complete.
This is really cute and funny. Jean's perspective on Erik is pretty entertaining. This is also a nice happy ending in the future for the movie (soon to be movies).