Cindy Campos reads the book "Stay Safe" to one of her sons in Dallas.
Students wearing clear backpacks outside a school in Parkland, Fla., in 2018. A Michigan school district has gone even further and banned backpacks altogether.
Mourners cried during a candlelight vigil at Public Square Park in Nashville on March 29 honoring the victims of the shooting.
A 6-year-old boy shot and injured his first-grade teacher at Richneck Elementary School in Newport News, Va., on Jan. 6, the authorities said.
People gathered for a vigil for Abigail Zwerner, the first-grade teacher who was shot at Richneck Elementary School.
The shooting at Richneck Elementary School on Jan. 6 prompted school officials to install metal detectors at all school buildings in the district.