Enlarge this imageDemonstrators hold a sign during a teachers strike in Los angeles, California, U.S.Scott Heins/Bloomberg by means of Getty Imageshide captiontoggle captionScott Heins/Bloomberg via Getty ImagesDemonstrators keep a sign in the course of a teachers strike in La, California, U.S.Scott Heins/Bloomberg by using Getty ImagesYou're examining NPR's weekly roundup of schooling information.'They're putting for Denver students'Teachers in Colorado's premier college district voted Tuesday to authorize a strike soon after far