<p>I’m most certainly a proponent of the TI-89. It’s an incredibly powerful calculator with a lot of functionality (beyond what is advertised at times…). I used for Algebra II, Pre-Calc, Calc BC, Stat, Mult. Calc, and Lin. Alg. and I wouldn’t trade it for anything. It’s definitely worth the money and will save you a great deal of time on tests.</p>