Though experts agree that technology isn't a cure-all for the latest wave of school violence, some school systems have beefed up their security measures recently with the help of high-tech solutions.

Visitors to Oklahoma's Jenks High School, for instance, soon must pass by a new high-tech school safety tool called LobbyGuard.

In an effort to strengthen school security, LobbyGuard's visitor-management kiosk can instantly check all campus visitors against national and state sex offender registries and other criminal databases and notify appropriate school and district personnel if a match is


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