Siemens offers free through the Siemens Digital Industries Software for Academic Program . Students can get a one-year license for NX 12 (or the latest version) completely free.
Would you like help finding academic eligibility requirements or official reseller contacts? Unigraphics Nx 12 Download
Since NX 12 has a unique interface compared to earlier "Unigraphics" versions, these resources are helpful for mastering it: Siemens offers free through the Siemens Digital Industries
2D sketching, 3D primitives (blocks, cylinders), and revolving/sweeping Learning Resources : Detailed guides like the NX 12 for Engineering Design 3D primitives (blocks