Lyncoln Zamarripa is the daughter of 32-year-old Patrick Zamarripa, who was among the five officers killed by a sniper who ambushed Dallas police in July 2016.
On Monday, Lyncoln was welcomed to her class by seven police officers.
They also welcomed Patrick's stepson, Dylan Hoover, to his fifth grade class.
SEE ALSO: Faces of victims of the deadly Dallas police ambush