Explain "Aunt Alexandra fitted into the world of Maycomb like a hand in a glove, but never into the world of Jem and me."

Aunt Alexandra comes to spend some time with Jem and Scout. The trial is going to start soon, and Atticus wants Aunt Alexandra's help with the kids. Jem and Scout are less than happy to learn that Aunt Alexandra is coming to stay with them. Aunt Alexandra is from the old school of the South, where people believed that a person's social standing was based upon how "good" their families were. This is in direct opposition to what Jem and Scout believe.

"Aunt Alexandra fitted into the world of Maycomb like a hand into a glove, but never into the world of Jem and me. I so often wondered how she could be Atticus's and Uncle Jack's sister that I revived half-remembered tales of changelings and mandrake roots that Jem had spun long ago."

Atticus has taught Jem and Scout to judge a person on the way they treat other people, and that a good family does not make a person good or bad. It is the person's character that makes them a good person. Aunt Alexandra is very caught up in the society thing. She believes that a family of good standing is what matters, and nothing else. Atticus, Jem and Scout know better.