Brandon Gonzalez, 16, leads fellow students in protest during a class walkout from the Richard R. Green High School of Teaching while participating in the national school walkout in Manhattan, New York City, on March 14, 2018. #

Students fill the grounds outside Montclair High School, 12 miles from midtown Manhattan, during a walkout one month after 17 Florida students were shot dead, in Montclair, New Jersey, on March 14, 2018. #

Thousands of local students march down Pennsylvania Avenue to the U.S. Capitol during a nationwide student walkout in support of gun control in Washington, D.C., on March 14, 2018. #

Thousands of local students sit for 17 minutes in honor of the 17 students killed last month in a high-school shooting in Florida, during a nationwide student walkout in support of gun control in front the White House in Washington, D.C., on March 14, 2018. #

Thousands of local students sit for 17 minutes in honor of the 17 students killed last month in a high school shooting in Florida. They sit in front of the White House, on March 14, 2018. #

Bethesda Chevy Chase students Alia Berry-Drobnick and Sam Blank gather with other students outside the White House as they join thousands of students across the country who walked out of classes to call for for stricter gun laws on March 14, 2018. #

Amanda Welch, 18, from New Jersey, and co-president of the school's Social Justice Council, poses for a portrait outside the front of The American School in London. She took part in a 17-minute walkout on the school playground, which was attended by approximately 300 students, aged 14 through 18, on March 14, 2018. #

A student from Fiorello H. Laguardia High School wears a "Stop Shooting" message on his face during the national school walkout in the Manhattan borough of New York City on March 14, 2018. #

A Henrico County motorcycle officer looks over students from Douglas Freeman High School as they walk out of school to protest gun violence in Richmond, Virginia, on March 14, 2018. #

Students from Harvest Collegiate High School form a circle around the fountain in Washington Square Park in New York to take part in a national walkout to protest gun violence one month after the shooting in Parkland, Florida, in which 17 people were killed, on March 14, 2018. #

Pat Gibson holds a drawing of Meadow Pollack, a victim of the Marjory Stoneman Douglas High School shooting, as she stands outside of the school as part of a nationwide protest against gun violence, on March 14, 2018, in Parkland, Florida. #

Students wear #ENOUGH pins as they gather on their soccer field during a 17-minute walkout protest at the Stivers School for the Arts in Dayton, Ohio, on March 14, 2018. #

Students at Philadelphia High School of Creative And Performing Arts participate in a walkout to address school safety and gun violence on March 14, 2018, in Philadelphia, Pennsylvania. #

Students from Fiorello H. Laguardia High School hold hands as they sit down on West 62nd street in support of the National School Walkout in Manhattan on March 14, 2018. #

Yarmouth High School student Sage Watterson reads a poem she wrote, titled "Never Again," during a walkout to protest gun violence in Yarmouth, Maine, on March 14, 2018. #

Students at Yarmouth High School participate in a walkout to protest gun violence on March 14, 2018, in Yarmouth, Maine. Leaders of the rally address the crowd from the back of a pickup truck in front of the school. Yarmouth is one of the few schools in Maine that did not cancel school on Wednesday as the state digs out from the third major winter storm in two weeks. #

Students wear #ENOUGH pins as they gather on their soccer field during a 17-minute walkout protest at the Stivers School for the Arts on March 14, 2018, in Dayton, Ohio. #

Washington, D.C., high-school student Sara Durbin joins with other students walking out of classes to demand stricter gun laws outside the U.S. Capitol on March 14, 2018. #

Students rally in front of the White House in Washington, D.C., on March 14, 2018. Students walked out of school to protest gun violence in the biggest demonstration yet of the student activism that has emerged in response to last month's massacre of 17 people at Florida's Marjory Stoneman Douglas High School. #