BeHere is an iBeacon app exploring how the bluetooth location capabilities of such a deployment might be used to automate student attendance. An interesting idea, though as the commentators at this iDownload article point out, there are several issues need to be addressed also such as privacy, students swapping devices or deleting the app etc.
As we are still in the very early days of exploring the use of iBeacons, beacons and motes in education, I've been scouring the web for ideas and examples to share. Today I came across this short but valuable slidedeck from LearningLab - in it you will find the beginnings of 5 iBeacon learning ideas - enough to trigger some thinking in the right direction on where bluetooth proximity-triggered beacons might take us.