These are the kinds of reassurances that parents want to give their children when something as horrific as a school shooting happens. The Washington Post has collected data showing more than 400 school shootings since the Columbine High School shooting in Colorado in 1999. Minneapolis Catholic school shooting: What we know so far Local authorities are reviewing hundreds of pieces of evidence. And every time a school shooting happens, like in Minneapolis on Wednesday, parents and teachers struggle to calm children’s anxieties. The American School Counselor Association has gathered a list of resources and tips to help after a school shooting.