Originally Posted by
qcpmsame
And, now they are having some high school, and even college classes for slide rule, because the students seem to get a better grasp of mathematical functions by using a rule.
A major advantage to the slide rule is that you really must set up the problem in a mathematically correct manner before you even pick up the slide rule, and estimate your result so you at least get the decimal point in the right place. With calculators, it's too easy to just start pressing buttons and blindly accept whatever number it spits out at the end.