A Texas substitute teacher was fired after she allegedly "encouraged" in-class fights at the Mesquite middle school where she taught, school officials said Friday. "Our investigation revealed that this substitute teacher encouraged students to fight each other during class, outlined rules for the students to follow and even instructed a student to monitor the classroom door while the fights took place," it said. Two fights, each pitting one student against another, were captured on video and audio, the station reported, with some students egging on others to participate in further rounds