You might try:
http://homeschooling.about.com/od/methods/
http://homeschooling.gomilpitas.com/index.htm
We're using KONOS (www.konos.com) and Saxon Math (www.saxonpublishers.com).
Good luck!
Is there a place where I can get all third grade with specialized math and science? My son is a year ahead in those two subjects.