A teacher on the job for only a few months played a big role in stopping the student gunman at a Washington state high school on Friday, witnesses and officials said, NBC News reported. Megan Silberberger, a social studies teacher, stepped in to halt shooter Jaylen Ray Fryberg when he opened fired in the Marysville Pilchuck High School cafeteria, said Randy Davis, the president of the Marysville Education Association. Four students were severely injured, and one was killed before Fryberg shot himself, according to police. Erick Cervantes, a student who witnessed the violence, said a teacher came through the cafeteria door and tried to swat the gun away from Fryberg before he aimed it at her. "She moved his hand, the weapon, and he shot himself," Cervantes said.