Texas Instruments TI-Nspire CAS Handheld with Touchpad
The TI-Nspire  CAS with Touchpad handheld device lets you map out your lessons, steer learners on their journey and help them to reach their goals with state-of-the-art TI-Nspire technology. With CAS (Computer Algebra Systems) you can perform numeric, exact and symbolic calculations, factor and expand expressions and solve equations and prepare and teach mathematically-rich lessons in less time.