Physics Education Research: Or it's so hard to find good help these days
  Physics education research (PER) aims to improve how students solve problems. But whose problems are we teaching students to solve? Physics has grown up as a child of war, and PER stems from the cognitive revolution in psychology, which arose from military needs and funding. Physics, PER, and state power are allies. By improving physics teaching, we arm the state against ourselves and move farther from a peaceful and humane world. 
Sanjoy Mahajan