You can sometimes gets used books from freecycle -- just post for them & see what turns up. Also, there are TONS of other places to get used books for VERY little $$ (thrift stores, online auctions, used book stores, libraries, etc).
There is more free curriculums/resources online than anyone could possibly know what to do with, though. You won't get a "textbook" from them, but you don't need them.
Sometimes (and this isn't my area of expertise since I've never used them) you can use online schools which will provide everything for free.... but you lose a lot of your freedom that way.
You can PM me if you want & I'll get you a list of resources. G'luck!
at 5:52 PM on Jan. 30, 2009