Amanda Bennett has a number of unit studies. I believe this was the first unit study I ever did and it got me hooked on the notion of combining multiple subjects into a cohesive unit of study.
If you love early American history, you will probably really love this curriculum. It’s rich with resources that you can add, just as we often did. We would take our time working through the content at a pace that was both manageable as an active family of six as well as enjoyable for all.
Another great unit study within this series is Pioneers, we really enjoyed these shorter unit studies, which can easily be geared towards K-8 or high school students.