The nation’s largest teachers union may soon endorse a policy statement encouraging the use of standardized test scores in evaluating teacher performance in the classroom, reports Yahoo! News. This big shift comes on the heels of the National Education Association’s decision to endorse President Obama’s presidential campaign surprisingly early–and in spite of the union’s frequent head-butting with the White House over Obama’s reform-minded policies. The NEA’s leadership has long blasted education reformers’ laser-focus on test scores, and opposed any move by the Education Department to evaluate teachers in part on how much they improve their students’ performance on standardized tests. They have said that such “value-added” data is unreliable, which makes this new stance all the more remarkable…