More suggestions added above.
Also, welcome to all newcomers to homeschooling. If you have any questions, please don't hesitate to ask. You will find the homeschoolers here very helpful.
Here are a few more links. Some of these sources were mentioned in posts above, too:
The Key To Series: Fractions, Decimals, Percents
Also see "Key Curriculum Press" mathematics by clicking on "Home" there.
Educators Publishing Service
"Explode the Code" (mentioned already here) is available there. We've used "Ridgewood Grammar".
Donna Young's Free Printables:
The HomeSchool Mom
UNIT STUDIES: BASEBALL
My 9yo son loves baseball. Here are some free online lesson plans we found on baseball math, physics, sportswriting, etc.:
PBS Fantasy Baseball (this is a PDF file)
The Batting Cage
Fun with Baseball Stats:
Learning from Baseball
Physics in Sports connection (online video):
Hope all is going well for all of you!