What is a good homeschool curriculum for high school?

I have recently started being homeschooled, and need a curriculum for the rest of the year. A semester-long curriculum would be great, if possible. I'm in 9th grade, but in mostly advanced classes, so it would also be good to be able to pick out individual courses I can take. It doesn't matter if it's computerized or on paper/books, as long as it's not incredibly expensive. If you're homeschooled, feel free to just say the program/curriculum you're using, and your thoughts about it.

Tons of homeschool information can be found at this website:

http://onlinehomeschoolingportal.blogspot.com/