I'm a firm believer in learning "evolving" on its own.
Our study of the Civil War has been a beautiful example of Interest Led Learning.
Yes, the Civil War is on our history "schedule" this year, but the specifics of studying it are not. I like to leave those specifics up to my children. My job is to provide a variety of resources, field trip opportunities, and inspiration so they can soak in as much about the subject as possible.
This is why I consider myself more of a homeschool GUIDE than a TEACHER.