In my college classes either calculators were permitted (physics and chemistry tests) or were irrelevant (upper division mathematics). When I taught high schoo

In my college classes either calculators were permitted (physics and chemistry tests) or were irrelevant (upper division mathematics). When I taught high school in the 00s, I had to impose rules about what sort of calculators were permitted to avoid cheating, especially as devices which could be used for communication like network-connected palm pilots were available.¹ I also wanted to have the kids avoid buying a $99 TI-89 when a much cheaper calculator was sufficient for the work they were doing. ⸻⸻⸻ 1. I remember one cheating technique that my friends in high school AP Chem used where a group of us were sharing a calculator. You would type in the question number you needed an answer for and someone else would type in the letter of the answer (we generally had multiple choice tests).