A small fire set in a classroom sparked another teacher assault at the West Philadelphia High School today.
The injured teacher was the eighth in two weeks to be assaulted at the school.
After a trash fire was set in a classroom, students were let outside to 48th street. Chaos erupted.
"Three students assaulted a 53-year-old teacher, punching him the face and knocking him to the ground," said police Capt. Michael Sinclair.
The teacher, a long-term substitute whose name was not released, was taken to the Hospital of the University of Pennsylvania. He suffered injuries to the face and jaw.