Unfortunately, all calculators were banned in many math classes (especially calculus) at university.

The sad thing about this is it takes away from learning then. We all know how to do 532+612 by that time, so a calculator simply gets you past those easy parts. My calculus teacher required us to show all our work on the new parts of the lesson, then would get to a point where she would say that we could do an earlier lesson now on our calculators in the interest of time, to get us to the new parts. This way, we actually got a decent way through the book and learned what we needed.