A student of anything is one who studies. Just showing up only half counts. They must also study. That means thinking about and practicing the art on their own time between classes.
One class per week would suffice for those who actually study. For those who just show up, not even five days a week are anywhere near enough.
As much as i agree with this statement, and certainly there are ppl in my class that i would hesitate to call "students" (as they seem to be there simply for social reasons or a very expensive workout), i think the term must be a little more democratic. I mean, there are slack students and bad students. There are many who don't do squat outside of class, for whatever reason - but are still capable of slowly progressing. There are heaps of students of Taiji who couldn't give a rat's about the martial applications, but know the qi-gong and forms well enough to compete or demonstrate. It seems to be a minority who actually care about the whole package of an art enough,
and are self-directed enough, and
have the time/energy to commit to it, that study MA in detail.
I agree with kosho about the humility and open-mindedness aspects of being a student. I guess if i had to nominate something that unites us all as students, those characteristics would fit the bill.
Oh, maybe not, just thought of something... what about those cocky students who want to fight and find it hard to let go enough to learn? Y'know, the ones with the chip on their shoulder. I guess once they learn to relax a bit the open-mindedness and humility comes... but aren't they students before that too?