There is a current thread which sort of addresses this. http://simplycharlottemason.com/scmforum/topic/chronological-history-w-more-than-1-child
I started my 9-yr-olds in the ancient world when they were 6 and have worked through history with them (now we’re in American). The 6-yr-old has sat in on everything, since birth basically. He has participated as he wants to and has been asking to do narration for the last two years – “When is it my turn to tell what I know?” He is officially in kindergarten (late b-day) so I don’t worry about how much he’s getting, but he does understand a lot.
Because we study the Bible daily, he really hasn’t been confused about Biblical timelines. He’s heard the story of creation and Christ so many times in his young life that he absolutely knows which comes first. At this age they really don’t have much concept of time anyways. It’s more important to me that he have fun and learn a little about the people, rather than worry about dates.
Next year when we study modern history he’ll be asked to sit still a little longer and still give narrations. I honestly haven’t noticed any confusion, but he’s still young. The 3-yr-old also sits in on stuff and in a few years he’ll begin to more actively participate.
Keeping a Book of Centuries will help them figure out the whole thing. I’m still learning too! As I was putting together my book list for American History I asked my husband if he knew that the Star Spangled Banner was written during the War of 1812, not the Revolutionary War like I’d always thought (he didn’t know either). And I didn’t realize the Gold Rush came before the Civil War. I’m 37, have a college degree, and I had never really learned that. So I figure if I do my best to make history fun, use living, engaging books and teach them the Bible they will grow up to be okay.
We’re not through yet so I can’t give you an absolute guarantee it will all work out okay (some of the more experienced moms might be able to do that), but thus far it’s working. On days when I start to panic that I’m ruining their lives and giving them a horrible education I try to remember that everyone has gaps in their learning and that pretty much anything I do is better than they’d be getting at a public school!
Heather