Handheld computing devices are catching on in thousands of classrooms across the country, as more educational applications have been developed to support learning. Now, an enterprising Colorado high school has harnessed the power of these devices to ensure student safety.

Craig Mansanares, a school resource officer at Skyline High School in Longmont, Colo., is one of six area officers who regularly use a personal digital assistant (PDA), in concert with a digital camera, to enforce school rules, catch miscreants, and file reports.

"Initially our commander bought the PDAs to help


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