I think that RFID de-humanizes and as such is unappealing, but there is something to say for increasing efficiency in taking attendance in the morning which takes away time from teachers and lecturers. Time that could be spent in teaching pupils.
I work at a company that provides a more privacy-advanced technology than this but with a similar application. However, we shaped the way it works around ensuring the privacy of the holders of the badges. We are dead-set against tracking* and provide only reactive systems for analysis** focusing on health & safety.
If you track* where people are you are not doing them justice. It's important to focus on the application's purpose and only gather insight around that specific problem. Meaning, that if you are fighting truancy you do not need to gather accurate knowledge about somebody's exact whereabouts. There is no need to accumulate information about bathroom breaks and lunchtimes, let alone storing it. This is the true problem with tracking, it is purposeless. It doesn't solve a specific problem but accumulates data that can be used to harm people. On the other hand, there is a concrete need for technology and systems that use data necessary to solve well defined known problems in the field of education.
In addition, our application's security policy is such that only a handful of people have access to information outside of the aggregated (and completely anonymous) dashboard. The information available as a dashboard alerts when there is something to warn about (for example if a person did not show up n days).
At beestar, we believe we have found the right balance between data gathering and rights for privacy.
* Tracking, defined as realtime, punctual and precise observation of accurate whereabouts of people and assets
** Analysis, defined as anonymous, reactive, contextual analyser of dangers and issues for people and assets