Where teachers and administrators have any say in the buying of textbooks, software, and testing materials, they should block the purchase of those sold by backers of the corporate take over of public education. If they can't get around the testing requirements, then fight for open source materials developed by teachers themselves that won't give our tax dollars to those trying to privatize our schools.
While K-12 teachers and administrators might have limited flexibility in these matters, they have a potential ally that has almost unlimited flexibility with choice of materials: colleges and universities, especially those with teachers prep programs.