How does Sylvia change from the beginning of "The Lesson" to the end of the story?

Sylvia is a tough girl throughout the story.  She truly
understands the lesson, and this knowledge creates an epiphany in her.  She learns the
lesson of class inequality and unfairness in spite of
herself. 

In the beginning, Sylvia considers Ms. Moore an
enemy.  She exists to interfere with her summer days by providing free "lessons" to the
neighborhood children.   Sylvia says that when Ms. Moore came
around...

And
our parents would yank our heads into some kinda shape and crisp up our clothes so we'd
be presentable for travel with Miss Moore, who always looked like she was going to
church though she never
did.

Sylvia resents having to
dress up to go with a woman that she did not like.  However, her resentment does not
extend beyond having to miss a childhood day in the streets.  By the end of the story,
she learns much more about the effect of her own lifestyle.  She is even more resentful
that her friends are beginning to learn this lesson as well, as evidenced by her
friend's statement:

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"I think," say Sugar pushing me off her feet
like she never done before cause I whip her ass in a minute, "that this is not much of a
democracy if you ask me. Equal chance to pursue happiness means an equal crack at the
dough, don't it?"

She learns
that there is a difference between rich and poor and that this different, while not
being fair, is very real.  As a child, Sylvia does not want to recognize her diminishing
ability to dictate her life.  As an intelligent young woman, she has
to.