Every pupil carries an electronic tag in their school bag which sets off an sensor when they enter or leave school.

If someone without a tag walks past the sensor an alarm goes off - so no one can wander round school unnoticed.

And when children leave school the system sends a text message to their parents telling them their kids are

heading home and the time they left.

This means parents have a good idea when to expect their children home, so know if they should be concerned.

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