What exactly is my job?

While working at the cafeteria, one of my two part time jobs, last week, I had the joy of breaking up yet another fight bewteen a couple of male students. In the process I took two punches to the face and jammed one finger.  After breaking up the fight, I escorted the to boys to the office and went back to my "real" job, helping one of the cashiers take cash and watch for students trying not to pay for lunch.  A few days go by and I read a bus driver friends blog and a question came to my mind as well as his.  What exactly is my job?  Is it my job to pick up and deliver student to and from school?  Is it my job to take money and watch for thieves in the lunch line? Or is it my job to intervene in the lives of the students who ride my bus?  Is it my job to teach manners and respect to these childern?  Is it my job to prevent students from hurting one another or others around them?  Are any or all of these my job?  In a word, yes.  I did not hire on to make sure my bus riders are happy, but it is rewarding to make a child having a rough day to smile or maybe even feel better about the day they have had.  I did not hire on at the cafeteria to be punched in the face, but I can not stand by and let two student hurt themselves or other students around them, while the other Mid-High staff refuse to intervene.  I try to down play my role as a "warden" at the Mid-High lunch room,  but after each fight I break up the word gets out really fast and the stories and rumors about me have been pretty humorous.  I have to say that working with kids of all ages has been completely different than I ever imagined.  So as many of you out there know, especailly when working with kids, your job you hire on for may not have anything to do with what is your actual job.