It's not a curriculum, and probably not up to date, but when I was in college I found "A People's History of The United States" by Howard Zinn life changing. It addresses topics that are either not taught or minimized by our traditional history courses (if you watch Good Will Hunting you will hear Matt Damon's character mention it as the "right" books to have). It's brutally honest about our history.
My son read this as part of our history studies when he was 11. He loved it, and is now a huge fan of Howard Zinn.
