HP HP39G Algebraic Graphing Calculator

Combining excellent usability with powerful features, the Hewlett-Packard algebraic graphing calculator is ideal for students, ranging from middle school algebra all the way up to high school and college level. Don't let the calculator's slim design fool you. Although it's compact and easy to slip in a pocket or desk drawer, the functions are meaty, and the high-contrast 131 x 64-pixel screen enables you to see more of your work.

Clearly designed for students, the calculator features a textbook mode allowing users to enter and view equations and expressions, electronic lessons adapted from textbook topics, and a split screen for side-by-side comparisons. And in the "Dang, that's cool" category, the calculator even features an infrared port enabling students to send data, equations, notes, and e-lessons to study buddies (no cheating, though!). The HP396 can also be hooked up to your PC or even an overhead display unit.

The keyboard is relatively friendly, featuring big keys with soft edges and wide key spacing for better keystroke accuracy. It runs on three AAA batteries and includes a one-year warranty.