I use My Father's World mainly for their history. I started their 5 year program when my children were in 2nd and 4th grades. I like it because it starts at the beginning (creation, first civilizations) and progresses chronologically, incorporating History, Bible, Science, Art and Music.
There are lots of good history cirriculums out there. I think going through history from beginning to current times gives a better overall understanding of where we came from and where we are going. It's just my personal preference though.
Here's a link to MFW in case you want to check it out
My Father's World - Homeschool and Christian School Curriculum