Project Idea Refinement

I'm looking to solve the problem of recording class attendance. The current solutions are slow, cumbersome, and inefficient. My idea is to take advantage of the RFID chip in Mcards by having an internet connected device by the door that you just tap your Mcard to when you enter. The device then uploads to the cloud and presents the professor with a nice web interface of who was in class, along with a historical record of all classes.