I haven't used it myself, but I have heard incredibly good things about the Hands-On Equations curriculum for Algebra. If you have a visual or kinesthetic learner in your house who is struggling with Algebra, I'm thinking this might be an incredibly good program to try.
I mention it now because SecularHomeschool.com is doing a giveaway for the program. It ends on Wednesday, though, so head over and enter quickly if you are interested. Here's the link to the giveaway: The Secular Homeschool Community - October Giveaway - Hands-On Equations Deluxe Home