Students can buy discounted licenses through Wolfram's Web store, but if you're teaching with Mathematica or if a significant quantity of students will be purchasing licenses, please contact Craig Bauling to inquire about larger discounts.
Mathematica has been installed on the HPC training machines. Note that these computers are running Linux, and Mathematica requires the X11 windowing system to provide a graphical interface. (Mathematica also requires special fonts to be downloaded and installed for this.)
To run Mathematica without the graphical interface, the command "math" can be used.