First year the school requires a scientific calculator for our sixth grader. What's a good one to get these days? These things sure have gone a long way back since the last time I needed one in college decades ago. I was rocking back then with a TI-55 programmable that took me thru high school and college. Now there's all these fancy graphing calc that I'm not sure is overkill or not or will these $20 ones do the job and I'd have to upgrade down the line. Any tips?