he students are already seated, and he surveys the assembly. In the back row a girl scribbles furiously in a fancy journal. Against the far wall a young man in sweat pants and a Minnesota Twins hat snores quietly—his desk empty, except for his head. In the front row Stevens spots Dana, the notorious overachiever, pretending to read Finnegans Wake.
with this section i could tell he is very observant and that he has done this for a long time.