Teachers at a Seattle-area high school are winning support locally and nationwide for their boycott of a standardized test used in teacher evaluations. Earlier this month teachers at Garfield High School voted to stop administering MAP tests, calling them wasteful and unfairly used to grade their performance. Teachers at several other Seattle schools have pledged their support for the boycott, and both the National Education Association and the American Federation of Teachers, which together have some 4.5 million members, have also given their endorsement. Observers say the Garfield boycott could mark the most significant revolt to date against the Obama administration’s embrace of standardized testing.