Seth Godin has a great post on being "good at math." I'm a designer that doesn't mind doing math. But when I was younger, I was convinced that I wasn't good at math and avoided it. It took a really great 12th grade calculus teacher to convince me that I could succeed at math.
Now I have a daughter that is convinced she isn't "good at math." My goal is to build her confidence in math before she gets to 12th grade.