(Salem, OR)  --  A teacher at an alternative school in Salem is on paid administrative leave, pending the investigation of an incident in which she reportedly tore the shirt off one of her students.  Officials say Carrie Mann has been with the Salem-Keizer school district for the past 23 years.  A cell-phone video shows her taking the shirt off Sara Rue during a scuffle at the Roberts Alternative High School Annex last Thursday.  Rue says she was leaving the classroom because of the anxiety she was feeling while the teacher argued with another student.