I still haven't figured out Social Studies, but after looking at the (Ohio) state academic standards, they seem so general, that studying about any culture, etc. would meet the criteria--maybe this is another place to get the text book to use as a guide and fill in with more interesting activities, reading, etc.
Or why not just ask your son what he'd like to study and hit the library?
Do be warned, most homeschooled kids score lower on the social studies part of the Iowa than on the other parts, since it's so much more content-based than skills-based. My child could run rings around most children in knowledge of the Norse, but he hasn't yet studied Native Americans as extensively as they have, so he didn't get the perfect or near-perfect scores on that section as he got elsewhere.
<shrug> Not a big deal. Just know that it's coming.
