Marysville-Pilchuck Class of 2018

More than 50 people have been killed and 100 injured in U.S. school shootings since Oct. 24, 2014, when a freshman opened fire on his classmates at Marysville-Pilchuck High School. During the high-school career of the Class of 2018, more than 41,000 students across the country have been exposed to school shootings, according to enrollment and shooting data compiled by The Washington Post.

*Reports unclear whether shooting happened on school property

Incidents shown here only include fatal school shootings during the four school years of the Marysville-Pilchuck Class of 2018. Death and injury counts show the number of people killed or injured on school property by shootings, including shooter suicides.

Sources: The Washington Post, Everytown Research, Marysville-Pilchuck High School, news sources

Design and development: Emily M. Eng, Alec Glassford and Thomas Wilburn

Research and reporting: Paige Cornwell, Laura Gordon, Sean Quinton and Ben Woodard