While checking my Google Reader subscriptions, I came across an excellent math resource on Kevin Cummins' excellent blog Edgalaxy. He featured the site Algebrahelp.com. This site includes lessons, worksheets, and exercises for students, teachers, and maybe even parents who need to brush up on some their math skills so they can help out with their kid's after-dinner homework. After about 5 minutes of browsing around Algebrahelp.com, I was able to figure out how to determine GCF (greatest common factor). This was something I distinctly remember struggling with as a math student back in my own grade school days.
Maybe Algebrahelp.com can help you out? Check out the site here.