Based on my experiences, it's less likely "calculator class" and more likely "integrals are done by pressing shift+ln(), then right arrow to enter the limits, t

Based on my experiences, it's less likely "calculator class" and more likely "integrals are done by pressing shift+ln(), then right arrow to enter the limits, then comma followed by the variable" (this is an example not following any real calculator) during calculus. So rather than teaching the topic fully and then letting students figure out how to aid themselves with calculators or computers, they teach how to do the technique on the dominant calculator. So if you're not inclined to read manuals or troubleshoot or think about what you're doing, having a Casio instead of a TI would be big trouble.