My sister in law is looking for US history supplement books/materials for her kids, who will be in 4th, 5th and 7th grade the upcoming year. They are all in public school, but she just recently realized how much of American history is left out of the text books. Does anyone have any good suggestions that they have used? My brother saw In Touch with Charles Stanley last week, featuring David Barton, and they want materials that will shed light on the faith of the forefathers, and what this country was truly founded on.... thanks!!