There have been at least 21 deadly mass shootings in the US so far in 2019 - ABC News
A Timeline of School Shootings Since Columbine
How many children are affected by school gun violence in America? - Washington Post
Chart: School Shootings: A Uniquely U.S. Problem | Statista
The 11 mass deadly school shootings that happened since Columbine - ABC News
Lessons From Our Year Tracking School Shootings: Students More Likely to Be Hit by Lightning Than Shot in Class, Yet Fear of Mass Violence Is Driving Policy | The 74
Map: Every School Shooting in America Since 2013
America's gun culture - in seven charts - BBC News
Chart: School Shootings in America | Statista
2018 'worst year for US school shootings' - BBC News
Mass Shootings in America | Everytown Research & Policy | Everytown Research & Policy
Assessing the social and emotional costs of mass shootings with Twitter data
The 11 mass deadly school shootings that happened since Columbine - ABC News
School shootings in the US compared with the rest of the world | CNN
Chart: Number of School Shootings Increased Every Decade | Statista
Mass Shootings in the United States in 2021 - The New York Times
More Guns, More Mass Shootings—Coincidence? – Mother Jones
The 18 Deadliest Mass Shootings in Modern US History
2018 'worst year for US school shootings' - BBC News
A List Of The Deadliest Mass Shootings In Modern U.S. History : The Two-Way : NPR
The 18 Deadliest Mass Shootings in Modern US History
The US averaged at least 1 deadly mass shooting a month in 2018 - ABC News
School Shooting Tracker: Counting school shootings since 2013
What This Week's Mass Shooting Can Teach Us About School Safety
