In summary there appears to be at least 18 gun incidents in, or around, schools between 1st January and 14th February 2018. They are not all of the "mass shooting" variety one might expect from the headlines but they have certainly all involved the accidental or intentional letting off of a firearm.
A few notes
I count 17, not 18 The 18th has been found (H/T @BradC)
- 2 were suicides
- 3 others involved fatalities
- 4 further incidents involved some injuries
- The remaining 9 led to no injuries or deaths
This figure has been widely reported after the terrible incident in Florida on February 14th, 2018. That is one school shooting in 2018.
A quick rundown of others:
2nd Jan: LA teen accidentally discharges weapon – injures 4 people (How?!?)
A 12-year-old girl was booked on suspicion of negligent discharge of a firearm Thursday after a shooting at Sal Castro Middle School left four students injured, authorities said.Los Angeles police do not believe that the shooting was intentional, spokesman Josh Rubenstein said Thursday evening.
- Los Angeles Times
3rd Jan: 31-year-old Michigan man commits suicide – happens to be at an elementary school
The Clinton County Sheriff's Office says a man who called 911 shot himself in the parking lot of East Olive Elementary School in St. Johns.
Deputies were called to the former school just before 1:00 p.m. on Wednesday afternoon.
The man had called 911, stated he was suicidal and told dispatch that he had a handgun with him.
A Clinton County negotiator talked to the 31-year-old man from Potterville for several hours before the man took his own life.
- WILX News 10
4th Jan: Shots fired off campus in Seattle enter the building – no injuries
Shots were fired and a bullet entered a building at New Start High School near Burien Thursday afternoon. King County Sheriff's Office officials said no one was hit or injured. Officials said a round was fired from outside of the school around 1:15 p.m. into the main administrative office. The office was occupied at the time.
10th Jan: Arizona teen commits suicide at school
The Cochise County Sheriff's Office said Wednesday a 14-year-old boy shot himself with a family member's firearm inside an elementary school bathroom in southern Arizona.
Sheriff Mark Dannels said in a news release that investigators recovered the weapon in Tuesday's shooting from the bathroom at Coronado Elementary School
10th Jan: Shots fired off campus happen to hit California State University building
Authorities say a gun was fired and a bullet hit a building on a Southern California college campus, but there were no reports of any injuries.
Officials at California State University, San Bernardino said the gunfire was reported at about 6 p.m. Wednesday local time.
San Bernardino police say the shot most likely came from just off campus and hit a window of the visual arts building on its west side.
- CBS News
10th Jan: Accidental weapon discharge at Texas school – no injuries
School officials said a bullet from an accidental discharge went through a classroom wall, came out through the other side and exited through a window.
It happened at the Grayson College Criminal Justice Center on Jan. 10.
- KXII News 12
15th Jan: Person in Texas drove into a school parking lot, let off some shots, and crash into a wall. No injuries
The Marshall Police Department is investigating a shooting that occurred on the Wiley College campus. On Monday, January 15, at approximately 12:15 a.m., officers responded to the area of University Avenue near Wiley Avenue on reports of gunshots. Preliminary reports indicate that a black sedan entered the Strickland Hall parking lot and possibly exchanged gunfire with a person who was in the parking lot. It is believed the black sedan was occupied by two subjects. The suspects in the sedan crashed into a retaining wall, causing damage to the retaining wall and the vehicle. The vehicle left the scene prior to officers arrival.
- KTBS 3
20th Jan: North Carolina university student shot and killed on campus
A Winston-Salem State University football player died after being shot at an event at Wake Forest University early Saturday morning.
Najee Ali Baker, 21, was taken to a hospital and died, according to a Winston-Salem police press release.
Police were called to The Barn, an event venue on the school's campus in the 1800 block of Wake Forest Drive, at about 1 a.m. after a gunshot was fired.
- WTHI-TV 10
22nd Jan: Someone drives past and shoots at kids outside of a school. Injures one, not seriously
New Orleans Police are investigating a shooting outside of a Gentilly high school Monday (Jan. 22) that left one 14-year-old boy injured with a "superficial" abrasion wound.
Police said someone in a dark pickup truck drove by The NET Charter High School, in the 6600 block of Franklin Avenue, and fired while a group of students were in front of the school, in the parking lot. The shooting took place about 1:30 p.m., principal Elizabeth Ostberg said.
22nd Jan: In Texas a high school student opens fire in the school cafeteria injuring one
A 16-year-old boy is in custody after a shooting at a Texas high school cafeteria Monday morning that injured one student, authorities said.
Just before 8 a.m. local time, police responded to reports of an active shooter at Italy High School in the town of Italy, about 50 miles south of Dallas.
A 15-year-old girl was wounded in the shooting and airlifted to Parkland Memorial Hospital in Dallas, according to the Ellis County Sheriff’s Office.
- The Washington Post
23rd Jan: Kentucky high school kid kills two at his high school
Two students were killed Tuesday and 18 other people were wounded when a 15-year-old boy armed with a handgun opened fire inside a Kentucky high school, authorities said.
Terrified students ditched their backpacks and scrambled to get away, and within minutes of the shots' having been fired, sheriff's deputies were at Marshall County High School in Benton, where they disarmed the student and took him into custody, officials said.
- NBC News
25th Jan: Two Alabama high school kids have a disagreement, one fires shots, nobody injured
Investigators said what started out as just a disagreement between two teenagers escalated to shots fired at Murphy High School.
Mobile Police identified the student as 16-year-old Jonah Neal. Neal has been booked into Mobile County Metro Jail.
- FOX10 News
31st Jan: Philadelphia Man dies outside (or near) a school after an altercation
A man has died following a shooting outside a Philadelphia high school.
It happened around 3:50 p.m. Wednesday near Lincoln High School located in the 3200 block of Ryan Ave.
Police say they were called out to the school for reports of a large fight and gunshots being fired in the parking lot.
31st Jan: Shots fired in a Michigan school carpark – no deaths
Shots were fired in the parking lot of Dearborn High School during a basketball game Friday night.
Two individuals were involved in an altercation in the hallway, according to an email from Dearborn Public Schools Superintendent Glenn Maleyko.
The individuals were not students of the school district and were reportedly "settling a score" from a previous encounter that occurred in another city.
5th Feb: Maryland high school student shot in the chest. Is "Critical" but leaves hospital a few hours later.
A teenage boy who was shot outside his high school this week was set up by an ex-girlfriend, charging documents say.
Police have charged 17-year-old Zanaya Bryant and 18-year-old Anthony Hollingsworth with attempted murder and related charges in connection with the shooting.
- NBC4 Washington
5th Feb: Minnesota third grader manages to pull the trigger of police officer's gun (I really shouldn't laugh at this should I?)
Nobody was injured Monday afternoon when a student at the Harmony Learning Center fired a school liaison officer’s gun, Maplewood police say.
The officer was sitting on a bench talking with some students about 1:45 p.m., when a third-grader pressed the trigger of the officer’s holstered weapon, according to a news release issued by the Maplewood Police Department.
The gun discharged through the bottom of the holster and a bullet struck the floor, the news release said.
- Twin Cities
8th Feb: Gun fired in a Bronx classroom – no deaths
Police are investigating after a gunshot was fired in a Bronx school Thursday.
It happened Metropolitan High School in the Longwood section around 3 p.m.
Police responded to the call at 3:20 p.m. They found a bullet hole in the floor of a classroom inside the school.
14th Feb: Florida shooting linked at the top of this answer
A former student unleashed a hail of gunfire in a Florida high school on Wednesday, killing at least 17 adults and children, authorities said. - CNN