I haven't changed the batteries in 8 months. I can do math on my TI-89 Titanium without even looking at it, that's not possible with any tablet. Real buttons

I haven't changed the batteries in 8 months. I can do math on my TI-89 Titanium without even looking at it, that's not possible with any tablet. Real buttons are worth the extra money. Depending on the complexity of the problem, there's many I'd rather use a calculator than even Maple or Mathematica, both of which would be an absolute nightmare to do on my iPhone. Also, you can still program it, which isn't available on anything iOS related unless you used javascript somehow (Fucking up the semi-empirical mass formula in Nuclear Physics was practically a pastime on my homework before I wrote a small basic program). Furthermore, no teacher/professor in their right mind is going to let anyone use a device capable of wireless communications on a test.