If you haven't installed it yet, Autodesk provides to students and educators, which is renewable as long as you remain eligible. Sign Up : Create an account on the Autodesk Education page .
By downloading this version, you aren't just learning software; you are learning the language of the engineering and design world. Just remember the golden rule:
The student version is a stripped-down "light" edition. It includes almost every tool found in the commercial version, including: