You would probably enjoy this book: "Project Based Homeschooling". It is almost unschooling. There is "structure" but it is the parent who needs to be structured to record and fully help her child in figuring out what their interests are and how to continue to encourage further exploration of those interests and how to facilitate them.
For me, I'm more of a "wing-it" girl. So I LOVED the concepts in this book but never quite implemented them in the structured way presented. I learned a lot though. Have a read! The thing about homeschooling/unschooling is to READ, READ, READ and then grab the concepts that you like and that actually work for you and your family.

http://project-based-homeschooling.com/camp-creek-blog