Stan Lehman in Newser reports that
Twenty thousand students in 25 of the of Vitoria da Conquista’s 213 public schools started using T-shirts with chips earlier this week, secretary Coriolano Moraes said by telephone.
By 2013, all of the city’s 43,000 public school students _ aged 4 to 14 _ will be using the chip-embedded T-shirts, he added.
The “intelligent uniforms” tell parents when their children enter the school building by sending a text message to their cell phones. Parents are also alerted if kids don’t show up 20 minutes after classes begin with the following message: “Your child has still not arrived at school
They are receiving interest from other Brazilian cities interested in absence management.