Hi bpgehrke,
For free math practice and help, I recommend that you set up an account at Khan Academy (
www.khanacademy.org). The site is completely free and makes the learning a bit more fun and 'game-like' (as opposed to the dry academic approach taken by most books). While the site is vast, you should limit your studies to basic Arithmetic, Algebra and Geometry. After spending a little time re-building those skills, you can start your GMAT studies.
It sounds like you're just starting out. Have you done any studying for the GMAT?
When are you planning to apply to Business School?
Do you know which Schools you're planning to apply to?
If you have any additional questions, then you can feel free to contact me directly.
GMAT assassins aren't born, they're made,
Rich