They have taken place across the country. From Georgia to California. At elementary, middle and high schools. On college and university campuses.
In 46 weeks this year, there have been 45 school shootings. That's nearly an average of one school shooting a week.
Of those, 32 of them were at facilities serving Kindergarten through 12th grade.
Since there is no single definition for what qualifies as a school shooting, CNN set the following parameters:
- The shooting must involve at least one person being shot (not including the shooter).
- The shooting must occur on school property, which includes but is not limited to buildings, athletic fields, parking lots, stadiums and buses.
- We included accidental discharge of a firearm as long as the first two parameters are met, except in instances where the sole shooter is law enforcement or a security officer.
- We included injuries sustained from BB guns, since the Consumer Product Safety Commission has identified them as potentially lethal.
Pleasantville, New Jersey
Gunfire erupted at a high school football game , injuring an adult and two minors. Five men were charged.
"Unlike some of the shootings that have occurred on school premises throughout the country, this incident had nothing to do with the students of Pleasantville High School or Camden High School," Atlantic County Prosecutor Damon G. Tyner said.
"The venue simply presented an opportunity for criminals to pursue their own form of petty vengeance against one another."
Santa Clarita, California
Two students were killed and three injured in a shooting at Saugus High School. The 16-year-old shooter turned the gun on himself and died in a hospital the next day .
A 19-year-old student was shot by a masked gunman while getting out of a car at Achievement Academy , a high school. His injuries were non-life-threatening. Authorities believe an altercation occurred between the victim and shooter.
A man was shot in the leg outside a dorm on the Langston University campus. He was taken via helicopter to an Oklahoma City hospital.
A University of Central Missouri student was shot and killed after a gun was accidentally discharged in an on-campus apartment.
A 30-year-old student was shot in the chest and killed in a Texas State Technical College housing facility. Police believe the 20-year-old shooter and the victim were involved in a relationship dispute that turned into a physical fight.
A 22-year-old man was shot and killed outside an Austin Peay State University residence hall. Police believe the incident was a drug deal gone wrong.
A 38-year-old woman was shot during a nighttime gathering in the parking lot of Laurel Woods Elementary School , police say.
Santa Rosa, California
A 16-year-old student was shot by another student outside Ridgway High School in what police believe to be a gang-related incident. The victim was taken to the hospital and later released.
A student and a police officer were shot and injured in a Grambling State University assembly center. During an event, two men were involved in an altercation when one produced a gun and shot the other twice in the chest. As police tried to intervene, an officer was shot in the leg.
Both victims were transported to the hospital. The officer sustained non-life-threatening injuries, while the other man was in critical condition.
A 19-year-old student was shot in the abdomen and killed in a Tennessee State University dorm. The incident occurred after an 18-year-old classmate discharged a stolen gun he was playing with. The shooter and victim thought the gun was a pellet gun.
After a football game at Rayne High School's stadium let out, multiple shots were fired into the parking lot, according to police. One person was hit and taken to the hospital. Police have arrested the men believed to be involved in the shooting.
Two men entered the playground at Greenhalge Elementary School and shot indiscriminately at children with BB guns, hitting five children. Two injured children were taken to the hospital with non-life-threatening injuries.
A gun was discharged after school hours at Westbury High School , injuring one student.
Orangeburg, South Carolina
Two women were shot outside a South Carolina State University residential building, according to university officials. Their injuries were not life-threatening.
Fayetteville, North Carolina
A 20-year-old former college football player was found with numerous gunshot wounds on Fayetteville State University 's campus. He was taken to the hospital in serious condition.
Fort Worth, Texas
A woman and a girl were injured when a fight between a group of parents led to a shooting at an Eastern Hills Elementary School football game, police said.
Newport News, Virginia
A teenager was shot outside Todd Stadium after a Newport News High School football game ended. The stadium is owned by Newport News Public Schools.
A 16-year-old was shot following an altercation as crowds left a high school football game at Central Catholic High School , police say.
At least 10 teenagers were injured in a shooting at Lad Peebles Stadium during a football game between LeFlore High School and Williamson High School.
A boy was shot in the jaw while waiting in line for school lunch at Hollenbeck Middle School . Authorities believe the shots came from off school campus.
On a playground at William C. Longstreth Elementary School , a teenager was shot in the back of the head. He was rushed to the hospital in critical condition where he would later die .
A 12-year-old boy was shot at Peek's Chapel Elementary School and rushed to the hospital. Another 15-year-old boy was arrested and charged with aggravated assault and aggravated battery in connection with the event.
A man, 34, was riding his bike through a Bulkeley High School parking lot when he was shot at least once. He died from his injuries.
A 22-year-old shot a teenager at the basketball court of Williwaw Elementary Schoo l after a fight broke out among a group of people, according to authorities. The teen was transported to the hospital with life-threatening injuries but survived.
Bronx, New York
A 13-year-old boy was shot in the chest at the School of Science and Applied Learning 's playground. He was transported to the hospital in serious but stable condition.
A 15-year-old student was critically injured in a shooting at a parking lot outside Carman-Ainsworth High School . The incident happened after a fight among dozens of students had broken out on school property and expanded to the area where the teen was shot, according to police.
A 25-year-old man was playing basketball at Genevieve Melody STEM Elementary School when he was shot in the leg, the Chicago Police Department told CNN.
A student was shot during a spring football game at Terry Parker High School . The victim was taken to a hospital with life-threatening injuries, but police later said he was in stable condition.
One Savannah State University student was shot near a campus residential facility and transported to a hospital. The student was expected to recover . The alleged shooter was not a student.
Highlands Ranch, Colorado
One student died and eight others were injured in a shooting at the STEM School Highlands Ranch . Two male students were charged with murder and attempted murder; one of them told police he sought to target classmates who had bullied him.
A 21-year-old man died from a gunshot wound after being shot in a parking lot near a fraternity house at the University of Oregon .
Charlotte, North Carolina
A gunman opened fire on the final day of classes at the University of North Carolina at Charlotte, killing two people and wounding four others -- three of them critically, authorities said. The shooter, 22, was a former student.
A student shot a fellow 8th-grade student in the hallway of Prescott High School , sheriff's deputies said. The injured boy was airlifted to the hospital. The school district said the shooting appeared to be a premeditated attack.
A 10-year-old student riding the bus home from Holmes County Elementary School was injured after he was struck by a bullet in his left hand. It's unclear where the bullet came from. The fifth-grader said another student on the bus shot him, but the school district said the bus was the target of a drive-by shooting.
A gun accidentally discharged in a Grambling State University dorm, injuring one student.
A 17-year-old student at Robert E. Lee High School was shot in the arm in the school's gym. The student's injury was non-life-threatening. Authorities said the suspect was a minor and likely a fellow student.
A 46-year-old man was shot multiple times by his neighbor at Eaglecrest High School amid an ongoing argument over a parking spot. The victim died from his injuries.
Kansas City, Missouri
A 15-year-old girl was shot outside Central Academy of Excellence during a basketball game. Police said the victim had fought with two shooting suspects, 21 and 18, during the game. The suspects were escorted out of the game and allegedly shot the girl when she left the building a short time later.
A Frederick Douglass High School staff member was seriously injured after a 25-year-old man entered the school and shot him. The shooter is a family member of the victim, police said.
A 16-year-old student was shot at Atascocita High School while trying to buy marijuana from a 17-year-old student, sheriff's deputies said. The student who was shot suffered non-life-threatening wounds, and police identified the shooter after he posted about the incident on Snapchat.
A 14-year-old student at Manassas High Schoo l ROTC was sent to the hospital for injuries after he was shot with a pellet gun at school.
A man was injured when he was shot outside Miller Grove High School after school hours. The victim, who was not a student, was running on the school's track when he saw someone trying to break into his vehicle. When he confronted the man, he was shot once, police said .
Two men, ages 17 and 20, got into an altercation outside W.P. Davidson High School that led to the exchange of gunfire, police said. Both were injured. At least one of the men was not a student at the school, the principal said.
A 17-year-old high school student was fatally shot outside Central Elementary School . Police said the victim knew the shooter and it was not a random crime.