Earlier quoted context omitted.
Thankfully for me, my college Calculus professor(in USA) banned calculators for Calc 1 and 2(the two required Calc classes for a computer science degree at my public university). He was heavily avoided by many and "special" for doing so. I found it easier to forego the calculator as it allowed us to focus on methods and how/why over just moving large numbers around.
That sounds pretty awesome actually! It also probably makes it a bit harder to prepare the materials, since you need to make sure it’s reasonably computable by hand.
Total math teacher too, his university email is so full if you email him it just bounces back.