Anya Kamanetz, " The School Shootings That Weren't", NPR Morning Edition, 27 Aug 2018.
Such quality of data in that US Dept of Edu report criticized by NPR!
The report said 240 schools reported shootings. NPR checked with the listed schools or school districts: 161 denied a shooting occurred. NPR was able to confirm 11 incidents. They found four cases where something not a shooting had happened. One-fourth of the schools or districts did not answer NPR.
Omro school district in Wisconsin asked the US Dept of Edu:
should a consensual paintball-gun fight involving students be reported as an "attack with a weapon" or as a "possession of a firearm."
NPR contacted Santa Monica-Malibu Unified district about their four reported shootings. The district told NPR no shootings happened. When the district tried to get the government to correct the report, the district was told they were a month late submitting the correction and the report would remain as published, would not be updated and reissued.