Dont think it's either. Seems to be a PC application. We've got it running on our grotty PC network.
Some of the teachers don't like it, because it simulates a fictional application suit, ie. not MS Office.
It is clever what it does, what with it marking what the kids actually do. But is contencious as to what it really proves, other than that most kids are already brainwashed into the MS way of doing things.
What is amusing is how exausted kids are after an intensive 50 minute session, against the clock, without their favourite little games and the 'real' internet for their usual recreation.