Social Studies Help!

We just received Olivia's first progress report from her new school she's attending here in Fayetteville and while she's doing well in most of the subjects she's struggling in Social Studies. We really need to bring her grade up and were wondering if there is any help via Homeschool books that we could help her on. I've asked her what the part of it she doesn't understand and she said all of it. So now I'm looking into getting her something that I can work with her at home to help build her skill level in this subject. So if you have any ideas on what we could do to help her with this issue then please let me know. Thanks in advance!