When it comes to going all out with school security technology, Shelbyville, Indiana has come up with an impressive example, at Southwestern High School. Access is limited to the main entry, where a metal detector is installed and a police officer keeps watch. Classroom doors and windows are bullet-proof. Motion detectors, cameras and even smoke bombs are installed throughout the school. Teachers wear panic alarms, and communications with the local police department are built-in. At $400,000 per school, that’s a serious investment—and I suspect that doesn’t include ongoing costs and staffing—but worth taking a look at.