im a senior and have a ti84 plus silver ediiton. I am pretty happy with it, comfortable with it, and know how to use it. My sister is a freshman now and needs a ti84. I was thinking about giving her my ti84 and buying myself a new ti89. Is this a good idea? I heard it takes some time to adjust and the ti89 is not allowed sometimes by some teachers and on some tests. I am in calc bc and ap physics c btw and plan a STEM major. Thank you.
I’m personally not a big fan of the TI89; I never quite got the hang of it. It’s true that some teachers sometimes won’t let you use it. If you can only have one, opt for the TI84.
I would use TI-84 because I’m positive it’s allowed on most tests you’ll need to take