This guy says that the problem is that high-school math education is structured to prepare people to learn calculus in their freshman year of college. But only a small minority of students ever takes calculus, and an even smaller minority ever uses it. And not many people ever make much use of pre-calc subjects like algebra, trig, or analytic geometry.
Instead, high-school math should be structured to prepare people to learn statistics. Probability and basic statistics, he argues, are not only more generally useful than calculus, they are also more fun.
I have to agree with him. What do the people here think?
Normal distributions and exp(-x^2) are sort of the exceptional case. Any reasonable study of probability and statistics will include probability density functions, which you can't talk about at all unless you explain integrals.
Of course, exp(-x^2) is harder to integrate than most pdfs (naturally occurring or artificial) that you'd run into. I wouldn't expect someone who learned enough calculus to understand integrals to know enough to integrate it. But before teaching someone to look values up in a table, I would want them to understand that the probabilities they're finding are an integral of the pdf, for intuition purposes.
I agree that the year-long calculus sequence that is the norm at most colleges is probably overkill for non-mathematicians, even ones that need to know some calculus. But the basic facts of calculus enhance understanding of a whole bunch of related ideas.
I wonder if it would work well to teach a calculus class which only focused on concepts and excluded any calculation whatsoever of derivatives and integrals -- given that Internet access is sufficient to integrate or differentiate any function you come across, those skills seem less relevant now.