"If you tell a lie big enough and keep repeating it, people will eventually come to believe it. The lie can be maintained only for such time as the State can shield the people from the political, economic and/or military consequences of the lie. It thus becomes vitally important for the State to use all of its powers to repress dissent, for the truth is the mortal enemy of the lie, and thus by extension, the truth is the greatest enemy of the State."
In 2009, the most authoritative study of charter schools was conducted by the Center for Research on Education Outcomes (CREDO) at Stanford University. The report is the first detailed national assessment of charter schools. It analyzed 70% of the nation's students attending charter schools and compared the academic progress of those students with that of demographically matched students in nearby public schools. The report found that 17% of charter schools reported academic gains that were significantly better than traditional public schools; 46% showed no difference from public schools; and 37% were significantly worse than their traditional public school counterparts. The authors of the report consider this a "sobering" finding about the quality of charter schools in the U.S. Charter schools showed a significantly greater variation in quality as compared with the more standardized public schools with many falling below public school performances and a few exceeding them significantly. Results vary for various demographics with Black and Hispanic children not doing as well as they would in public schools, but with children from poverty backgrounds, students learning English, and brighter students doing better; average students do poorer. While the obvious solution to the widely varying quality of charter schools would be to close those that perform below the level of public schools, this is hard to accomplish in practice as even a poor school has its supporters.