Altogether, four people have been killed and 17 wounded, according to law enforcement authorities and media reports, with two recent shootings — at a university in Charlotte, North Carolina, last week and at a school in Highlands Ranch, Colorado, this week — accounting for the bulk of the toll.
The New York Times defined a school shooting as one that occurred on campus and involved students, either as the accused perpetrators or the victims.
Jan. 31, Memphis, Tennessee
A 14-year-old at Manassas High School in Memphis was shot with a pellet gun at school, according to news reports. The student’s injury was not life-threatening.
Feb. 8, Baltimore, Maryland
A man entered Frederick Douglass High School and shot and wounded a staff member, prompting students to hide in their classrooms at the sound of gunfire. Police said they believed the gunman had targeted the victim, a 56-year-old special education assistant.
Feb. 12, Kansas City, Missouri
A teenage girl was shot and killed outside a high school in Kansas City after an argument at an evening basketball game. Police said the assailant and girl knew each other, and that it appeared the suspect had waited in the parking lot and shot the girl as she left the game.
Feb. 26, Montgomery, Alabama
A 17-year-old student at Robert E. Lee High School was shot and wounded in an arm by another student, police said. The school was placed on lockdown and the assailant was arrested. According to media reports, it was the second time in two years that a student had taken a gun to that school and shot another student.
April 1, Prescott, Arkansas
A 14-year-old eighth-grader at Prescott High School was shot and injured by a classmate, who the authorities said took a concealed handgun to school.
April 30, Charlotte, North Carolina
Two students were killed and four were wounded after a gunman opened fire in an anthropology class at the University of North Carolina at Charlotte. One of the students who was killed, Riley Howell, was credited with charging and body slamming the gunman, stopping the massacre.
May 7, Highlands Ranch, Colorado
One student was killed and eight others were injured this week in an attack on an English class at STEM School Highlands Ranch. Two students were apprehended and charged with the shooting, which took place just miles from Columbine High School, the site of a massacre 20 years ago.
May 7, Savannah, Georgia
A Savannah State University student was shot and wounded in a residential hall on campus. Authorities said a man who was not a student was arrested in the shooting.
This article originally appeared in The New York Times.