A science teacher has been sacked after an amateur video of her beating up a 13-year-old boy was posted on YouTube.
Forty-year-old Sherri Davis from Houston, Texas, was fired on Tuesday after her school was shown video footage of her attacking pupil Isaiah Reagins.
According to local press, Davis became angry after Reagins teased one of his classmates. Before attacking, she shouted at him: "You want to fight a girl? Fight me".
Other teachers and adults were present when the assault took place. There was also CCTV footage of the incident but the school said it had been automatically wiped.
Davis had been placed on administrative leave after the attack on 29 April.
Both the school and the teacher are being sued by the mother of the victim.