I just took US History 1 and 2. I studied 2 weeks on US History 1 and 2 weeks on US History 2, I then took and passed both of the tests. I got a 59 on US History 1 and a 62 on US History 2. I studied with IC and the US History 1 & 2 REA study guides. If I still didn't understand something I looked it up online.

Hope that helps.