Teachers at a school have reacted with horror to a video of their middle-aged female colleague being repeatedly punched in the face and abused by a male student. The teenager has been arrested after a classmate filmed the profanity-laden physical attack at Parkland High School in North Salem, North Carolina. The teacher sits motionless in the classroom as the student lands a right-handed punch to her cheek before he steps back and demands: 'Want me to hit you again?' 'I don't want it,' she replies before he repeats his demand and punches her again, this time with his left. District...