My Father's World is Christian based system that uses off the shelf books. It has a well written lesson plan unlike the LifePac system we had used the year prior. This system has Christian tones throughout most of the subjects. For the English lessons we were reading Christian stories and for geography we were reading about missionaries in different countries. History we read about the main historical events as well as Christians of the era we were studying. If you have multiple children in grades 3-8 you can teach them together with the exception of math and language arts. We used this system for two years for grades 1-3.