J.R.
I've been staying home with my 3-year-old since she was born, and have been "schooling" her since day one. She is so advanced now, there's no sense in her even going to pre-school. Some of the best FREE schooling sites are:
www.starfall.com
http://www.bbc.co.uk/cbeebies/
http://www.little-g.com/shockwave/games.html
http://www.britishcouncil.org/kids.htm
http://www.kindersite.org/Directory/DirectoryFrame.htm
http://www.bbc.co.uk/wales/snapdragon/yesflash/menu.shtml
http://www.tvokids.com/bigbackyard/
http://www.bemboszoo.com/Bembo.swf
http://www.little-g.com/shockwave/beginning.html
http://www.funbrain.com/vocab/index.html
http://www.create-a-reader.com/basic/_english.html
http://www.readinglesson.com/
http://www.letteroftheweek.com/index.html
These are a fraction of the sites that I've used to homeschool my daughter. She not only has a ton of fun learning, but requests her daily lessons.