Here's the National Assessment of Educational Progess, "The Nation's Report Card: U.S. History 2010" which is the basis for the article. http://nces.ed.gov/nat

Here's the National Assessment of Educational Progess, "The Nation's Report Card: U.S. History 2010" which is the basis for the article. http://nces.ed.gov/nationsreportcard/pubs/main2010/2011468.asp http://nces.ed.gov/nationsreportcard/pubs/main2010/2011468.a...