Texas Instruments TI-Nspire CX II Premium Teacher Software Graphing Calculator, White

The battery life is great, and it has so many amazing functions. Honestly, it makes me a little less motivated to learn the content, but technology has done this to society on many facets. I'd definitely recommend it for calculus, algebra, and stats.

There is a moderate learning curve. The touchpad is great but it takes a little practice. The CAS has solved problems and formatted answers better than my HP49g and I highly recommend it. I think TI should make it easier to graph vertical lines. I was disappointed when it could not graph abs(x)<3. I had to graph x>-3 then graph x<3 using the text tool. I would be nice to be able to enter x= equations a easy as you can enter f(x)= equations. I teach math at a university and at a highschool and linear programming often has inequalities involving x<30 and the like. Also when there are several layers of inequalities it can be a little hard to distinguish the feasible region. TI could make it easier to change the background colors. The gray scale CAS model did a better job with the layered shading. Overall I would rate this calculator at the top of my favorite calculators.