What are the differences between Walter Cunningham's, Chuck Little's, and Burris Ewells' appearances and their behaviors, and why do they...

Out of these three characters, Walter Cunningham and
Little Chuck Little are higher than Burris Ewell in social class standing.  Chuck isn't
seen again in the novel, but it's assumed that he has a tough life, as he "was another
member of the population who didn't know where his next meal was coming from."  Walter
has that same situation, since he doesn't have lunch with him at school, and has no way
of paying back a quarter if the teacher was to loan him one.  However, one of these boys
shows he has manners.  Chuck fusses over Miss Caroline after Burris makes a scene and
leaves for good.  Chuck also shows bravery when he stands up to Burris in class. This
scene needed a little hero, and that was Chuck's
role.

Walter shows his ignorance of how to conduct himself
at the dinner table when he visits the Finch house for lunch.  He piles food on his
plate, and then covers it with molasses.  This only shows how scarce food must be at his
house.  He does seem as grown up as Chuck, as he is able to hold several adult
conversations with Atticus during lunch.

Burris is the
perfect definition of white trash.  He is dirty, offensive and cruel.  He defies Miss
Caroline in front of the whole class and even calls her a "snot-nosed slut" as he
leaves.  He doesn't take care of himself either, since he's the one with the cutie
bug.

These three characters are put together to show the
difference within similar classes in their society.  Although they are all in the same
financial situation, Chuck shines as a little gentleman, Walter is the hard working
farmer, and Burris is as low as they get.  So social classes don't necessarily define
who they are in this book.  Each character is just as complex as the
novel.