The Associated Press reports that a mother is accused of bursting into a high school classroom and helping her teen daughter beat up another student, even holding the other teen and instructing her child strike the girl in the face with a combination lock, police said. The mother, Precious Allen, her daughter and another woman barged into the classroom at Withrow High School in Cincinnati last week, with the mother and daughter assaulting the 15-year-old student with their fists and the lock, police spokeswoman Sgt. Julian Johnson said Tuesday. The other girl suffered cuts and bruises, and a teacher ended up with a black eye in the scuffle. Allen, 31, of Cincinnati, is charged with felonious assault and aggravated criminal trespass, court records show…