How does Scout show that she has matured throughout To Kill A Mockingbird?

The most explicit indicator of Scout's increasing maturity
is after Tom Robinson's trial at one of Aunt Alexandra's mission society teas.  Since
coming to stay with her brother, niece, and nephew, Alexandra has been at cross purposes
with Scout, embroiled as she is in a desperate and largely unsuccessful effort to turn
Scout into a lady worthy of the Finch name.  However, as the novel draws closer to the
end, Atticus comes into the kitchen to ask Calpurnia to accompany him to tell Tom
Robinson's wife that he has died, and Scout, observing her aunt composing herself to
return to the ladies, determines that she will compose herself as well.  In the
tradition of Southern womanhood, she eschews any sort of dramatic reaction, and
calmly returns to the guests, offering them refreshments, a much different young lady
than the overall-clad girl the reader meets at the novel's
beginning.