Right now, at the vast majority of schools, if you're an elementary schooler who's learning addition, subtraction, multiplication, division, fractions, decimals, etc., you are NOT using a calculator. Your questions will mainly look like "what is 584 + 678 / 3", and using a calculator would defeat the point as it'll give you all the answers.
However, by the time you reach middle and high school, they'll start letting you use calculators for SOME questions. Your teacher might allow calculators for some units but not others, and there might be calculator and non-calculator portions of the same exam. But by then the questions will be rigorous enough for calculators not to be able to give you the full answer straight away, as you might in elementary school.
You'll never be asked a question like "what is sqrt(11)" or "what is ln(2)" on a math exam. If you get a calculation involving one of those irrational constants on a non-calculator assignment, they'll just tell you to leave it in simplest terms. Even before calculators were widespread, if they wanted exact values, they'd give you a table of logarithms, roots, trigonometric function values, etc.
I suspect English assignments would be dealt with similarly in response to LLMs. Easy to BS your way through HW, but you're on your own in an exam room, stripped of any tools, and that's where your knowledge would really count. So basically English might be taught more like a math or science class.