You know, one variation of the Raspberry Pi I'd like to see for the educational market, is a standard graphing calculator based on the Pi's internals. The reason: Even though I'm not convinced that graphical calculators really help students that much, many schools require them anyway. So why not take a (somewhat expensive) necessary device, and make it more functional when you plug in a keyboard/monitor?

I wonder what the price point could be of a device with a decent screen (somewhat better than the TI's), battery/charging, physical buttons, case, plus the Raspberry Pi?