Conservatives have long complained about schools' use of Howard Zinn's A People's History of the United States. But, a popular AP U.S. History textbook, The American Pageant, written by Thomas Bailey, David Kennedy, and Lizabeth Cohen, is also riddled with inaccuracies. That's according to Daniel Oliver, chairman of the board of the Education and Research Institute.  

“Almost every other page” has liberal bias, Oliver charged during an interview with Townhall on Tuesday.