After a brilliant but asocial mathematician accepts secret work in cryptography, his life takes a turn to the surreal.
A Beautiful Mind is the Academy Award-winning film based on the life of Nobel Laureate, John Nash. This is a great math classroom film, which features cryptography and game theory.
These guiding questions have been broken down into 3 days of viewing (the film is 135 minutes), but can be easily edited to suit your classroom needs. Enjoy!