The Professors character in the movie seems like he is seeking some sort of higher pleasure, that he is not only teaching to feed the youth of our nation but also that he gets his jollys from teaching. He is very well with kids and he knows this, through his own frusteration and greed he attempts a transfer to another school in a neighboring town, but we he stays with the students for a little time he knows he is there only and last hope and takes back his transfer.
We have only got to about half of the movie but so far the children in the school play a huge part in the film. They to me stand for another part of the professors life seeing how he is very lonely and it doesnt seem like he has mucbh family. I predict that later on in the film he will still be with these same kids, or maybe get transfered against his will and he and the children figure a way to get him back as their teacher? who knows.