Check this out- Straight from AT&T's website-


RFID Tags Help Schools Keep Tabs

One day soon, Homeroom Teachers in your local middle and high schools may stop scanning rows of desks and making each student yell out “Here!” during a morning roll call.

Instead, small cards, or tags, carried by each student will transmit a unique serial number via radio signal to an electronic reader near the school door. Students won’t have to stop, swipe their cards, press their fingers against a pad or interrupt their chatter with friends as they pile into school. The reader will instantly relay the signals from their tags to a school computer network that marks them as present.

Some schools are already experimenting with RFID. enterprise
charter School in Buffalo, N.Y. began using it three years ago to take daily attendance of its 600 students. Schools in Texas
and california have tried the technology, and a large school in Florida is considering it.

[link to www.corp.att.com]