Thousands of students walked out of classrooms nationwide Wednesday to protest gun violence and call for new gun control measures on the one month anniversary of the Parkland school shooting that left 17 dead and sparked a grassroots wave of activism.

From Maine to Hawaii, students left school to demonstrate against gun violence in what could be the biggest display yet of the student activism that has emerged in response to last month’s massacre at Florida’s Marjory Stoneman Douglas High School.

In nearly 3,000 reported protests nationwide, students from the elementary to college level took up the call in a variety of ways. Some took part in roadside rallies to honor shooting victims and protest violence. Others held demonstrations in school gyms or on football fields. In Massachusetts and Georgia and Ohio, students went to the statehouse to lobby for new gun regulations.

The coordinated walkouts were loosely organized by Empower, the youth wing of the Women’s March, which brought hundreds of thousands of demonstrators to Washington, D.C., last year. The group urged students to leave class at 10 a.m. local time for 17 minutes — one minute for each victim in the Florida shooting — and suggested demands for lawmakers, including an assault weapons ban and mandatory background checks for all gun sales.

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