Every few weeks this comes up on MDC, hsing for free, or at least very, very cheap. The last time it came up I realized that here, at least, I have, sadly, an enormous amount of experience and resources. I've been a single mom from the start, with no child support (O hasn't seen his father since he was 20 months old), not much family support (my parents were immigrants), and no career (at least when I had O.) So, one thing I've learned to do very well over the years is to live frugally and hs using free or used resources.
Since money is an issue for any family, no matter what their circumstances, and nobody wants to be wasteful, I thought I'd start logging in some of the sites I have found most useful over the years.
Ref Desk - this was our home page for many years, where we started our day, and the springboard for many conversations and hours spent searching new information. O is now past the age of wanting mere information, facts, or pictures, so he doesn't use Ref Desk much anymore, he has his own set of reference sites, but it's a great starting point online.
Budget Homeschool - just what it says, an enormous clearing house of links. Some links are broken, and some are trial and error, but it's still very helpful.
Ambleside Online - a free, e-text based, Charlotte Mason curriculum
An Old-Fashioned Education - another free, complete curriculum, based on public domain e-texts. Christian but still useful.
Free Curriculum on the Internet - this is by no means a comprehensive list of free curriculum and educational sites. Anyone with other clearing house type sites, please comment and let me know! I love to collect links (as you may be able to tell.)