A high-tech satellite locator system originally meant to help parents keep closer tabs on their children is now being used by some educators, enabling them to pinpoint students' whereabouts on field trips and in other potentially dangerous situations when teachers lead kids outside the safety of the schoolyard.

Called the GPS Locator for Kids, the lockable wristwatch-like device manufactured by California-based Wherify Wireless combines the precision of Global Positioning System (GPS) technology and the reach of a PCS wireless network to track students via the internet within 30 meters of their actual location. ...

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