How Do I Build My Quantitative Background?

[Kevin1990]

I am plannng on applying to grad school for International Affairs and I noticed that at least a couple of the programs I'm interested in what some sort of quantitative or eonomic courses taken before applying to the program.

I have a very weak background in both quant and econ. I also work full time. 

I was wondering what options I have to improve my record in this area? I know community college or taking non-degree courses at a university are possible options but I don't know if this will work with my schedule?

Thank you in advance for any input I receive.

Kevin1990,