"Tom Bensky was frustrated.
The physics professor at California Polytechnic State University, San Luis Obispo, had tried every way he could think of to take attendance efficiently in his large classes. He used a good old-fashioned sign-in sheet. He attempted a bar code system, where he would scan students on their way out of the classroom. Both were too time-consuming and students would forget to mark themselves present."—Source: Inside Higher Ed
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WHY THIS MATTERS:
Geofencing is common in sports stadiums, and it is starting to gain popularity in retail. But it is relatively new in higher education. The privacy concerns are real, as outlined here. There's also a legitimate question about GPS or location-based hacks, such as spoofing.