AUSTIN, Texas – To 15-year-old Andrea Hernandez, the tracking microchip embedded in her student ID card is a “mark of the beast,” sacrilege to her Christian faith – not to mention how it pinpoints her location, even in the school bathroom.

But to her budget-reeling San Antonio school district, those chips carry a potential $1.7 million in classroom funds.

Starting this fall, the fourth-largest school district in Texas is experimenting with “locator” chips in student ID badges on two of its campuses, allowing administrators to track the whereabouts of 4,200 students with GPS-like precision. Hernandez’s refusal to participate isn’t a twist on teenage rebellion, but has launched a debate over privacy and religion that has forged rare like-mindedness between typically opposing groups.