NEW: Florida teacher fired after hanging a black doll with a cord wrapped around the doll’s neck in class.The incident happened at Barrington Middle School in Hillsborough County.One of the students says after class the teacher, Karen Savage, started following him when he went to report what happened.“After I saw what was happening, I just, like, decided that, like, I wanted to get proof that it actually happened,” middle school student Noah Carter said.“She followed me after class was over, and