Texas Instruments - TI-89 Graphic Calculator Review

The Texas Instruments TI-89 Graphic Calculator is the best graphics calculator I have ever used. I've worked as a mathematics tutor for years, so I've seen my fair share of them. My only warning is it is easy to get too dependent on its features and forget how to do things for yourself (which could be bad as this calculator may or may not be allowed in a particular class).

It is only slightly more expensive than the TI-83 or TI-84, but it can do far more (and it is much easier to use than either of those). It can solve equations, do matrices, diferentiate, intergrate, and loads more.

One of the best features is that is saves the last 20 or so entries you have made AND you can scroll up to those inputs and use them again. It is also really easy to go back and correct mistakes. If you give the 89 a chance you will never want to go back to and 83 or 84.