Provide evidence from the novel To Kill a Mockingbird that shows how Calpurnia's lecture about manners changes Scout?

In Chapter 3, Jem invites Walter Cunningham Jr. over to have dinner with the family. Before Walter is about to eat, he asks for some molasses. Calpurnia gives him the bowl of syrup and Walter proceeds to pour it all over his meat and vegetables. Scout asks him "what the sam hill" he is doing (Lee 32). Walter is embarrassed, and Atticus shakes his head at Scout. Scout protests, saying that she can't believe Walter poured syrup all over his dinner. Calpurnia is furious and calls Scout into the kitchen to give her a lecture on manners. Calpurnia tells Scout that Walter is their company, and she has no right to contradict him about the way he chooses to eat his food. Scout says, "He ain't company, Cal, he's just a Cunningham---." (Lee 33) Calpurnia explains to Scout that anybody who enters the house is considered company. She also says that it doesn't matter if the Finches are "better" than the Cunninghams, it doesn't count for anything if Scout treats them with disrespect.

In Chapter 3, Scout clearly views Walter as a person who is from a lower social class and is abnormally different. She refuses to respect Walter as a guest and comments that he is "just a Cunningham" (Lee 33). After Calpurnia lectures Scout on the importance of having manners and respecting others, Scout changes the way she views Walter. Later on in the novel, Scout asks her Aunt Alexandra if she can invite Walter Cunningham over to play. Scout loses her cool after Aunt Alexandra says Walter cannot come over because he is trash. Scout is furious and says to Jem, "Naw, it was Walter---that boy's not trash, Jem" (Lee 302). Scout goes on to tell Jem,

"That Walter's as smart as he can be, he just gets held back sometimes because he has to stay out and help his daddy. Nothin's wrong with him. Naw, Jem, I think there's just one kind of folks. Folks" (Lee 304).

Scout learned to respect Walter as an individual, even if he did act differently. She heeded Calpurnia's lesson on manners and respecting others, and ended up viewing Walter Cunningham Jr. as an equal.