The vast majority of people do not need to be buried under calculus, it's almost as stupid as teaching kids to write with joined up handwriting, it's of no relevance to the real world and it turns people off.<p>However we have a population that have no idea about how things like interest rates work, how loans, mortgages, savings etc work, what pensions do, how to determine if that 2-for-1 deal is better than that separate 50% off deal, the total cost of ownership for a 3 month phone bundled contract vs buying the phone upfront (or with a loan), etc.<p>None of that is taught in maths. It could be taught in numeracy or finance or some other lesson, it should be taught, but there's a big difference between doing matrix transformations of imaginary numbers and working out that you're being fleeced by Tesco