School shootings in the sense of multiple fatalities, which occur about once a year. From a criminology professor:
Everytown for Gun Safety reported that there have been 290 school shootings since the catastrophic massacre in Newtown, Conn., more than five years ago. However, very few of these were anything akin to Sandy Hook or Parkland. Sure, they all involved a school of some type (including technical schools and colleges) as well as a firearm, but the outcomes were hardly similar. Nearly half of the 290 were completed or attempted suicides, accidental discharges of a gun, or shootings with not a single individual being injured. Of the remainder, the vast majority involved either one fatality or none at all.[…]
Since 1990, there have been 22 shootings at elementary and secondary schools in which two or more people were killed, not counting those perpetrators who committed suicide.[…]
Notwithstanding the occasional multiple-fatality shooting that takes place at one of the 100,000 public schools across America, the nation’s schools are safe. Over the past quarter-century, on average about 10 students are slain in school shootings annually.
Compare the school fatality rate with the more than 100 school-age children accidentally killed each year riding their bikes or walking to school. Congress might be too timid to pass gun legislation to protect children, but how about a national bicycle helmet law for minors? Half of the states do not require them.