It's just a standard card with RFID embedded, right? Unless I'm wrong here, the cards can be read by the standard scanners mounted on the doors. So rather than some creepy "tracking device", they'd have to be used for registering entry/exit from a classroom explicitly - pretty much the same as any big office... Which doesn't seem to make much sense to me, since they can move around without scanning the card (enter behind another person) - this happens even in many workplaces where everyone is supposed to scan their tag on entry.<p>Another strange part is that when looking at attendance, this seems even easier to hack - just give your tag to someone else so they can scan it.<p>Am I missing something here? Are there RFID tags that work on longer distances?<p>Edit: Found some long-range RFID solutions out there. Other points remain though... seems easy to game and many offices already use it.