Some schools use a volume license server, allowing you to install the software for free using a campus-wide key.
TI provides a fully functional 90-day trial for both Student and Teacher software versions. This is the only guaranteed "free" way to use the desktop software legally. Hardware Bundles: ti nspire free license number
When you purchase a brand-new TI-Nspire calculator, the box typically contains a "License ID" and a "Validation Number." This is a unique activation code that allows you to install the Student Software on one computer. Some schools use a volume license server, allowing