I even found my son a TI-83 clone that runs on his iPod (called PI-83) but he's scared to depend on it because of the total dependency of the class on the calculator.
*sigh* at least the stupid TI-84+ is on sale this week at Target...
This is exactly what I've seen. TI provides tons of input, including free hardware to the writers and to the book publishers, and gets their calculators' keysequences published DIRECTLY in the book. Some publishers even offer purchase of the calculators at a discount courtesy of TI.
I...