In California, the Anaheim Union High School District is also in the midst of testing a GPS tracking program. From Salon:
Each school day, the delinquent students get an automated “wake-up” phone call reminding them that they need to get to school on time. In addition, five times a day they are required to enter a code that tracks their locations: as they leave for school, when they arrive at school, at lunchtime, when they leave school and at 8pm. These students are also assigned an adult “coach” who calls them at least three times a week to see how they are doing and help them find effective ways to make sure they get to school.