Linda Darling-Hammond of Stanford University posted this graphic on Twitter. It shows the flat lines and declines of U.S. scores on the international PISA test from 2000-2012.

Just think of the waste of billions of dollars for testing under both No Child Left Behind and Race to the Top. Think of the children cheated of a real education. Think about the fact that Arne Duncan says that high-stakes testing is non-negotiable in any new Elementary and Secondary Education Act.

Is it not the definition of insanity to do the same thing over and over for a dozen years without success and to expect better results if you do it for another 7-10 years?