Multi-activation license allows installation on a fixed number of computers using a single activation code (five seat minimum). Single license allows installation on one computer. Send lesson files between the software and handhelds and vice versa via USB (good for one to one lesson transfer) or TI-Nspire CX docking station (included with the TI-Nspire CX teacher pack can transfer documents from one to 50 handhelds simultaneously).TI-Nspire CX handheld emulator allows students to follow along on their handhelds as you present the digital lesson.TI-Nspire Teacher Software has a built-in Question application to create lessons with embedded assessments - question types include free response, multiple choice, true-false, image and chemistry (where the student response considers the coefficients and subscripting in the chemical formulas).Teachers can create dynamic lessons with the built-in Publishview feature adding images, video, text and data to documents.Full data collection support with over 60 Vernier™ and TI sensors using the Vernier Go!Link™ sensor adapter or the TI-Nspire Lab Cradle (sold separately).Choose from hundreds of free lessons that include video snippets and simulations of science concepts at.CAS (Computer Algebra System) is useful for symbolic calculations such as scientific unit cancellation. Includes both the TI-Nspire and TI-Nspire CAS versions in one product.