Sexual assault has become a dominant topic on the nation's college campuses in recent years. But it has largely remained a hidden issue in elementary, middle and high schools. Twenty-one percent of middle school students reported that they experienced unwanted physical touching on school grounds, according to a 2014 study by researchers at the University of Illinois at Urbana-Champaign. Among high school students, 4 percent of boys and 10 percent of girls say they have been forced to have sexual intercourse against their will, according to a 2013 survey by the Centers for Disease Control and Prevention. The Obama administration has taken an aggressive approach to enforcing the anti-discrimination law known as Title IX, which requires K-12 schools and colleges to guard against sexual harassment and sexual violence. The law is based on the idea that children should be protected from hostile environments that make it impossible for them to fully participate in school. The Education Department in fiscal 2015 received 65 civil rights complaints related to K-12 school districts' handling of sexual violence - triple the number the agency had received the year before. Esther Warkov and Joel Levin, whose daughter was allegedly raped in 2012 during an overnight field trip with her Seattle high school, believe that addressing the problem will take a massive movement of students and families who know what their Title IX rights are and demand that schools meet them.