I think most will agree that the ti-83+ will get you through most courses, but the ti-89 has everything anyone could ever need... if i had this calculator in highschool im pretty sure I would have had no problems in any math/calc classes... i never had any teachers who would not allow calculators in highschool. Now college is a different story, so far my calculus 1 - 3 professors do not allow calculators. But like someone said up there, they become very usefull in other classes, and even in trying to understand concepts in calculus.
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