Mary Sherlach, 56, was the school psychologist at Sandy Hook Elementary School. Sherlach was meeting with principal Dawn Hochsprung when the shooting began. The two ran into the hallway and immediately confronted the gunman. Sherlach was killed then, while warning the other faculty and saving their lives. Sherlach was one year from retirement and reportedly looked forward to spending more time in her and her husband's cabin on Owasco Lake in the Finger Lakes, Upstate New York.
You can read more about her here.