Darren Metzger, in his seven year career as a high school English teacher, has already seen a few revolutions in his profession. “I have one foot on both sides of the digital shift,” said Metzger. “When I started as a first year teacher, we all got a couple of paper grade books. Now, they only stock a few for the whole school. It is first come, first serve, and it is always the veteran teachers who line up to grab one.” To save money, Metzger’s schools system changed over to digital grading and record keeping. In Metzger’s case, while he…