Summary of “School lockdowns: How many American children have hidden from gun violence?”

More than 4.1 million students endured at least one lockdown in the 2017-2018 school year alone, according to a first-of-its-kind analysis by The Washington Post that included a review of 20,000 news stories and data from school districts in 31 of the country’s largest cities.
The total figure is likely much higher because many school districts – including in Detroit and Chicago – do not track them and hundreds never make the news, particularly when they happen at urban schools attended primarily by children of color.
Still, on a typical day last school year, at least 16 campuses locked down, with nine related to gun violence or the threat of it.
School systems in every state and the District had several last school year, The Post’s analysis found, and they happened in buildings with as few as four students and as many as 5,000.
Last school year, the system Czajkowski oversees, Sweetwater Union High School District, dealt with 71 student threats, he said, but only seven times did schools lock down, and five of those were prompted by off-campus danger, such as a burglary or gunfire.
In the month after dozens of people were slaughtered at a Las Vegas country music festival on Oct. 1, 2017, the number of lockdowns in Nevada’s Clark County School District spiked 42 percent to a total of 37, the highest count during the entire school year.
Last school year, there were 136 lockdowns of varying degrees across the 110 schools in the Columbus district, one of the highest ratios among large-city systems that The Post reviewed.
A year of carnage in American schools In April, the country will mark the 20th anniversary of the massacre at Columbine High, and that day will arrive in the aftermath of the worst year of school shootings in modern American history.

The orginal article.