I have heard that a primary school in Japan is testing a system to improve the security of students and also give their parents peace of mind. A radio frequency identification tag carried by each student sends a signal to receivers at school gates, and a computer shows when each student enters or leaves. The system can automatically send an e-mail to notify parents that their children have arrived at school or left for home. In cities where children often commute long distances to school, the system has received high marks from parents, and the kids think it’s cool.

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