The TI-30 scientific calculator from Texas Instruments is the required calculator for most middle school math classes. TI-83 and Ti-84 are graphing calculators used in high school math classes. These calculators can be pricey. So try the free calculator downloads and graphing calculator apps available here.
TI-30 scientific calculators have function keys for algebra and algebraic equations, trigonometry, scientific math, decimal to fraction converter, unit converter, complex numbers and RPS.
EEWeb has free online scientific calculator tools for laptop and desktop computer software.
Texas Instruments website has free downloads for their products also. The online TI-30 scientific calculator software can be purchased for $14.95. The advantage in using online scientific calculators is that handheld are easier to lose or get stolen.
Google Play has free graphing calculator apps for Android users. iTunes has free TI 30 apps as well. If you can find a good freebie, I suggest buying an app for the iPhone or Android. This turns makes the device into a calculator and means one less tool to lose.
