Gun violence has hit more than 20 schools across the country since the start of 2024, and one of the latest K-12 schools to grapple with gun-related deaths and injuries is a Georgia high school.

Four people were killed and nine others were injured in a shooting at Apalachee High School in Winder, a suburb of Atlanta, early Wednesday morning. It was the 23rd time this year that a school shooting left someone injured or dead, according to data compiled by Education Week, a K-12 news organization.

Education Week is just one of many organizations that collect data on gun violence in schools. But unlike the National Gun Violence Archive or the K-12 School Shooting Database, it only tracks incidents that meet certain criteria:

• Reported incidents involving firearm discharge

• In the event that any person other than the suspect or perpetrator has sustained a gunshot wound as a result of the incident

• Occurred on K-12 school grounds or on a school bus

• It took place during school hours or at a school-sponsored event.

Taking these factors into account, there will be 38 school shootings in 2023 — 15 more than in 2024, including the shooting in Georgia on Wednesday.

Since 2018, when Education Week began tracking school shootings, there have been approximately 205 school shootings.

Apalachee High School Press Conference: Watch live as officials provide updates

How many school shootings will there be in 2024?

According to a tally by Education Week, 22 school shootings before Wednesday in Georgia resulted in seven deaths and 29 injuries. Of the seven fatalities, three were students or children, and four were school staff or adults.

Including Wednesday’s deaths and injuries, 49 people have been killed or injured in school shootings in 2024, including 11 killed and 38 injured.

Here is the total number of people, including children and adults, who have been killed or injured in school shootings since 2018:

• 2024: 49 people injured or killed in 23 school shootings

• 2023: 63 people injured or killed in 38 school shootings

• 2022: 140 people injured or killed in 51 school shootings

• 2021: 70 people killed or injured in 35 school shootings

• 2020: 12 people killed or injured in 10 school shootings

• 2019: 40 people killed or injured in 24 school shootings

• 2018: 114 people killed or injured, 24 school shootings in 2018

• Total: 488 people killed or injured in 205 school shootings since 2018

When and where have the other school shootings occurred this year?

Education Week’s list of school shootings reported in 2024 includes incidents that occurred in K-12 schools across the country and resulted in the death or injury of a person shot with a firearm.

While all of the reported incidents occurred at a K-12 school, not every reported school shooting has put the lives of students, teachers, or staff in danger. Some of those incidents, including those reported in New Mexico and Oregon, occurred after hours.

Below is a list of school shootings reported so far in 2024, starting from January 1, 2024, to September 4, 2024.

1. January 3, 2024: 1 injured in Manchester High School parking lot in Midlothian, Virginia

2. January 4, 2024: 2 dead, 6 injured at Perry High School in Perry, Iowa

3. January 11, 2024: 1 person injured in parking lot of Miami Northwestern Senior High in Miami, Florida

4. January 29, 2024: 1 injured in Connally High School parking lot in Austin, Texas

5. January 30, 2024: 2 injured at LeFlore High School in Mobile, Alabama

6. January 30, 2024: 1 injured in Grant Union High School parking lot in Sacramento, California

7. February 2, 2024: 2 injured in parking lot of McEachern High School in Powder Springs, Georgia

8. February 14, 2024: 4 injured in parking lot of Benjamin E. Mays High School in Atlanta, Georgia

9. February 26, 2024: 1 injured in Odessa, Texas high school parking lot

10. March 2, 2024: 2 injured in parking lot of North Kansas City High School in North Kansas City, Missouri

11. April 12, 2024: 1 person injured at Wilmer-Hutchins High School in Dallas, Texas

12. April 22, 2024: 1 person killed at William Wiley Elementary School in West Richland, Washington

13. April 24, 2024: 1 person killed at James Bowie High School in Austin, Texas

14. May 5, 2024: 1 person injured at Dunbar High School in Washington, DC

15. May 7, 2024: 1 person injured at Parkland High School in Winston-Salem, North Carolina

16. May 10, 2024: 1 person injured at Hastings High School in Houston, Texas

17. May 22, 2024: 1 person killed in parking lot of North Marion High School in Citra, Florida

18. May 23, 2024: 2 injured at Skyline High School in Oakland, California

19. May 24, 2024: 1 person killed in parking lot of Gadsden High School in Anthony, New Mexico

20. June 6, 2024: 1 person killed in the parking lot of Garfield High School in Seattle, Washington.

21. June 30, 2024: 1 person injured at Klamath Union High School in Klamath Falls, Oregon

22. August 19, 2024: 1 injured in Bossier High School parking lot in Bossier City, Louisiana

23. September 4, 2024: 4 killed, 9 injured at Apalachee High School in Winder, Georgia

This article originally appeared on USA TODAY: School shootings: Gun violence has hit 23 K-12 schools this year