These are some websites that have some great information and resources, and the links should all work.
http://homeschoolmath.blogspot.com/ a fellow blogger who knows math
http://donnayoung.org/ love this site, tons of resources, many different subjects
http://www.ourlosbanos.com/homeschool/index.html great homeschool resources
http://www.math-drills.com/ timed math drills are like a game, who knew ?!
http://42explore.com/index.htm just use the top part to start exploring, great for unit studies
http://oldfashionededucation.com/ lots of good stuff here