Hey, I am taking Algebra 1 this year and Geometry next year. I'm also taking a pre-trig course this year. I need a graphing calculator from Texas Instruments, but I don't know if I should get a TI-83+, TI84+, or TI-84+ Silver Edition. I was interested on the Texas Instruments website where it said the TI-83+ is not reccomended for Geometry. Has anybody here used one for Geometry? What is the best long term value? (TI-83+ is $90, TI84+ is 110, and TI84+ Silver is 130). Thanks a bunch for the help! 1000th post, yay!