Students are reported for possession of non-firearm weapons about 20 times as often as they are for firearms. But schools are still relatively safe places, and many crime statistics in schools have been improving for years, experts say. 

Easy to conceal, harder to detect: Knives more prevalent than guns in schools 

School lockers 

The National Conference on Active School Threats-East is convening in Raleigh, just two days after police say a teenager stabbed two fellow students, killing one of them, at Southeast Raleigh High School.

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