We tried unschooling for 2 years, and we all haaaaated it. I think structure was missing. We started classical last year, and the kids' ideas and excitement skyrocketed. They love when we go to the library and find book about what we were reading in school. And they started speaking latin to each other... Quite humorous. Latin's not dead anymore!
We studied about nomadic people last year in ancient civilization, and they took right to the hunter-gatherer notion. Made perfect sense to them. Now, if I could figure out how to tell them to stop telling everyone, "Did you know what you're eating is bad for you?!"
Don't let anybody tell you, "You can't" just because they can't.