The majority of schools in America are safe places. A comparison of national data from 1995 and 2001 shows the percentage of students who reported being victims of crime at school decreased by 4 percent (DeVoe et. al. 2003). In 1999 the US Departments of Education and Justice reported that almost 90 percent of all in-school student injuries that required medical treatment were accidental, rather than the result of intentional acts of physical violence. Schools see fewer homicides and non-fatal injuries than homes or neighborhoods. From 1992 to 2000, school-aged youth were 70 times more likely to be murdered outside of school than in school (US Department of Education 2001). The violence that does occur in schools, however, has changed. Serious violent acts are now more common than in the past. In the 1940s, school discipline problems generally involved running in the halls, chewing gum, talking out of turn, and other unruly behavior. In the 1970s, discipline problems progressed to dress code violations; in the 1980s, fighting became a concern. By the 1990s, school problems were defined as weapons possession, drug and alcohol abuse, gang activity, truancy, and violent assaults against students and teachers.