@farmerman,
I do not know how they now deal with the teaching of calculus but my first college calculus text book was god awful as it did not seem hardly to try to explain the concepts behind the rules given to solve problems!
However, I found a wonderful book in the library who title is lost forever in the dim past that did explained how all those rules came about along with a little history of Newton and Leibniz development of the subject. The book even gave some background of the Greek mathematicians works that used some of the principles that a thousand years later was incorporated into calculus.
So Famerman for once I agree with you. Hmm, I wonder if good old Asimov ever wrote a book on the subject, if so knowing him it would be a useful and interesting read.