Sandy Hook Elementary School, newtown, Connecticut (27 killed)
Robb elementary school shooting, uvalde, Texas (21 killed)
Marjory stoneman Douglas high school shooting, parkland, Florida (17 killed)
Columbine high school massacre, Columbine, Colorado (13 killed)
Santa Fe high school shooting, Santa Fe, Texas (10 killed)
Red lake senior high school shooting red lake, Minnesota (9 killed)
Cleveland elementary school shooting, Stockton, california (5 killed)
Westside middle school shooting, Jonesboro, Arkansas (5 killed)
Marysville pilchuck high school, marysville, Washington (4 killed)
Thurston high school shooting, Springfield, Oregon (4 killed)