Rachel Davino, Lauren Rousseau and Victoria Soto were teachers at Sandy Hook Elementary School in Newtown, Conn., on the day of the shooting in December.

Dawn Hochsprung was the school principal. Anne Marie Murphy was a teacher’s aide. Mary Sherlach was the school psychologist.

All six were among those killed by alleged gunman Adam Lanza on Dec. 14, 2012. And all six were among the 18 Americans honored by President Obama on Friday with the 2012 Presidential Citizens Medal. The award is the country’s second-highest civilian honor.