http://www.thatquiz.org/ for practice problems.

http://en.wikipedia.org/wiki/Mathomatic an open source math solver, will also output answers to programming code, can solve polynomials, do calculus, trig...etc. You can use it to check your answers.

http://www.math.com/ the website has a lot of topics.

You don't neccessarily 'need' a textbook. You can probably find the information you seek all online. If you have any questions you can ask yahoo answers.

http://tutorial.math.lamar.edu/links.aspx http://etc.usf.edu/math/index.htm an overwhelming list of math sites. SOS math has worked well at helping me in the past.