And at what point do we decide that someone is not good at math or any other subject? First, with proper instruction, most people can understand at least algebra and geometry. They might have a phobia based on previous poor math instruction, but that doesn't mean they are unable to learn it. So, when do you let students decide they hate math and not take it? Middle school? High school? Is it responsible to let students opt out of a large number of career choices before they have a solid idea of what they want to do in life?