Retaking undergrad courses years after graduating

[JCP82]

Hiya! I am planning to apply to Ph.D. programs in education policy/research methods at a number of top tier schools within the next 2-3 years. I am primarily looking at schools that have a very heavy focus on quantitative methods. As an undergrad (graduated in 2004), I majored in economics and minored in math. Unfortunately, I didn't decide to pick up that math minor until the summer before my senior year, and prior to that point I had only taken one semester of calculus. So basically my last two semesters were crammed full of upper division economics courses and a buttload of math, along with my heavy load of student activities. I was a bit overloaded, and some of my math grades suffered (B/C range). Plus, since it's been a few years since I graduated, my math skills are a little rusty.

One of the benefits of my current job is that they will pay for up to 6 credits of tuition per semester, so I've been thinking of retaking some of my undergrad level math classes (specifically Calc 2+3, Linear Algebra, Calc-based Prob/Stats, Differential Equations, maybe Real Analysis). Does this seem like it would be worth doing? Presuming I get all A's (cause damn it, I'm going to!), will that be likely to help my application? If they see that I took Calc 3 and got a C in 2003, but took it again in 2011 and got an A, do you think they would be likely to overlook the C? Am I just crazy?

Thanks for your input!