Keep it simple, stupid
There was an interesting article in the New York Times a couple of weeks ago arguing that algebra, trig, and calculus are wasted on students with no aptitude for math, and they should instead be offered courses in "quantititative literacy - the ability to handle our own finances, understand percentages and probability and risk, and intelligently assess what 'experts' like banks and doctors and politicians tell us about the mathematics of real life".
I have a few quibbles (for example, I think basic algebra is useful for everyone, and I think the concept of math "aptitude" is highly suspect) but, on the whole, the notion makes a lot of sense to me. There's little point teaching quadratic equations to students who are still counting on their fingers! H/T to Chas




The article contains some valuable insights. I’ve tutored a number of students in “advanced” upper school math, who shortly dropped out of the course realizing their gaping algebra void could not be filled in time to catch up. Not to mention the necessary pre-algebra numerical fluency .
If one can’t grasp elementary algebra and its antecedent skills, it is impossible to understand things like mortgage finance. Which may be why “don’t pay till 2012” or “24 easy payments” or “only 279 per month lease rate” are so attractive to folk. And why there are more visa cards than Canadians. And so on.