J.L.
If you've done some research on what teaching approach and you plan to use a classical approach or Charlotte Mason, you'll get alot of mileage out of this website compiled of tried and true text books. Read the host's explaination and history of how she found and gathered these textbooks first, so you understand the value of using these texts (some are from the 1920s!). Even if you use a boxed curriuculum, these resources are invaluable.
Enjoy! It's fun to go through these texts. There literally hundreds to choose from here.
See: http://oldfashionededucation.com/
For worksheets aimed at grades K-3 check out www.enchantedlearning.com, and www.apples4theteacher.com
And for freebies and more, get on the e-mail list for The Old Schoolhouse Magazine for homeschoolers. See: http://thehomeschoolmagazine.com/
or see: http://thehomeschoolmagazine.com/freebiedirectory/2010/in...
to sign up for TOS e-mails look at the bottom right hand corner on this link:
http://thehomeschoolmagazine.com/How_To_Homeschool_Articl...
Have you checked with your local public school district offices? Some school districts offer online homeschool programs and provide computers, textbooks, etc. at no cost, as it's an extension of the public school system.