In the wake of the February 14 mass shooting at Marjory Stoneman Douglas High School in Parkland, Florida—during which 17 people were killed and more than a dozen injured—students at that high school and across the United States have been galvanized into action. A number of protests are now planned, including nationwide school walkouts on March 14 and April 20 and a march in Washington, D.C., on March 24. These events are but the latest in a long history of student protests. Whether fighting for equality, an end to war, religious freedom, economic opportunity or political ideology, students have recognized there’s power in numbers. Most protests have been peaceful; however, in many cases students put their lives on the line for their voices to be heard.