The ti84 (and related calculators) will very likely see your kid through college unless they major in accounting or finance - in which case there are special financial calculators you invest it. Its a good calculator. We own three - mine from college and one for each of my kids - they are very sturdy - my kids just entered high school, but my daughter needed one as early as fifth grade. Look up how to program reducing radicals when your kid gets that far.
Our school has a lot of low income students, and therefore there is a challenge in that although the calculators are required and mandatory for Algebra and above, only about 2/3s of the kids have them - there are a few loaners - makes class really challenging.
Ours is a note that kids will be allowed to bring laptops in after Winter break, so I'll need two laptops for my kids. They don't HAVE to have them - but like the calculator - the ability of the haves to function will outpace those whose parents didnt spring for a laptop.
I can't even count the number of calculators that my DD has had to purchase in college. Her latest requirement was some sort of expensive financial calculator.
But as to school fees and what-not- we have always had to pay school fees for a public education, even as far back as when I was in kindergarten. So, I do not even give those a second thought. College is far more expensive than anything I ever had to pay for DD's elementary, middle and high school expenses.