Scout describes Walter Cunningham's life situation to her teacher to explain why he may not have the means to pay back the lunch money she offered him. Scout wants her teacher to understand that Walter comes from a less privileged background, where money is scarce and not easily given away.
Scout learned from Atticus, her father, that the Cunninghams were country farmers, and were decimated by the stock crash. He explained to her they were very proud, and did not accept charity, leading to Walter Cunningham's refusal of lunch money offered by the teacher. She learned that Mr Cunningham's entailment was being paid off in produce, since he had no cash.
Scout is upset with Walter Cunningham because her teacher, Miss Caroline, doesn't understand that the Cunninghams are poor and can't afford lunch money. She is also upset when her classmate, Burris Ewell, insults Walter for accepting charity and being a "coward."
Jem stopped her.
Scout was left the unpleasant task by the rest of her classmates to explain to the teacher that Walter Cunningham could not borrow any money for lunch because his family simply couldn't afford to repay that money. This explanation got Scout into trouble with the teacher as it was seen as rude. Ergo, Scout was angry and annoyed with Walter Cunningham. Because he made her look bad on the first day of school, after she defended/explained his reason for rejecting the teacher's 25 cents. Scout rubs Walter Cunninghams's nose in the dirt because he made her, "start off on the wrong foot." Ms. Caroline (Scout and Walter's first grade teacher, new to Maycomb) asked Walter why he had no lunch with him and was not riding the bus into town to get his own. He lied (if you recall, the Cunninghams were a poor farmworking family) and said he had left his money at home. Ms. Caroline, not knowing any better, offered him three quarters to go into town and buy a lunch. When Walter refused (fearing entailment) Scout piped up and explained how the Cunninghams were a poor family and never take anything from anybody that they can't pay back. Ms. Caroline thought this to be awfully offensive, slapped Scout on the palm and sent her to the corner until lunch time. Directly before leaving for lunch, was when Scout caught Walter outside and began to beat him up.
Jem asked Walter to come home with him for lunch so that Walter could have a meal since the Cunninghams were too poor to afford lunch at school.
Aunt Alexandra believes that the Cunninghams are not socially equal to the Finch family, so she disapproves of Scout being friends with Walter Cunningham. She thinks that associating with the Cunninghams could affect the family's reputation and social standing.
Scout attacked Walter because he accidentally made her late for school, causing her to get in trouble with her teacher, Miss Caroline. Scout was frustrated with the situation and took out her anger on Walter by fighting him.
Scout's punishment for trying to help Walter is a reprimand from her teacher, Miss Caroline. The class laughs because they find it amusing that Scout doesn't understand the social stratification and expectations of the community, as well as the unwritten rules about how the Ewells are regarded compared to the Cunninghams.
Because she got in trouble for exposing why Walter didn't wanna take ms.Caroline's money
Walter White was a High School Chemistry Teacher.
In "To Kill a Mockingbird," Walter Cunningham Sr. is portrayed as illiterate, having limited formal education. In the book, Scout mentions that Walter Sr. never went to school, or else he would have been able to understand Atticus's attempts to help him with his finances.
Jem and Scout got in a fist fight , not Atticus and Scout.