We've been loosely following the guidelines outlined in The Well Trained Mind since 2005. It's a meaty, comprehensive guide to homeschooling. I highly recommend adapting it to fit your child, rather than trying to fit your family into the schedule in the book.
We also use her books, Story of the World for history. Our kids just finished the 4th year of SOTW and are starting back at the beginning with "Ancient Times" now.
Midwife (CPM, LDM) and homeschooling mama to:
yo ds 11
yo dd 9
yo ds and 7