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Fifty-seven percent of public elementary and secondary school principals reported that one or more incidents of crime/violence that were reported to the police or other law enforcement officials had occurred in their school during the 1996-97 school year.
Ten percent of all public schools experienced one or more serious violent crimes (defined as murder, rape or other type of sexual battery, suicide, physical attack or fight with a weapon, or robbery) that were reported to police or other law enforcement officials during the 1996-97 school year.
Physical attacks or fights without a weapon led the list of reported crimes in public schools with about 190,000 such incidents reported for 1996-97 (Figure 1). About 116,000 incidents of theft or larceny were reported along with 98,000 incidents of vandalism. These less serious or nonviolent crimes were more common than serious violent crimes, with schools reporting about 4,000 incidents of rape or other type of sexual battery, 7,000 robberies, and 11,000 incidents of physical attacks or fights in which weapons were used.
While 43 percent of public schools reported no incidents of crime in 1996-97, 37 percent reported from one to five crimes and about 20 percent reported six crimes or more
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Stats a bit dated... but interesting nevertheless. I have seen little to give me reason to believe things have improved much in that area.