Tolerance is one of the major themes of "To Kill a Mockingbird". How many examples of tolerance are found in chapter 3?
There are about 5 instances that show that theme.
In this chapter we see Jem, Atticus and Calpurnia showing degrees of tolerance with Walter Jr. They accept the difference in others and don't judge others. Jem invites him over, Atticus holds a good long conversation with Walter, just like two men. Then Calpurnia fetches the syrup for Walter, knowing that he was going to use it on his food (instead of something more sensible), but she stands patiently and waits for him to use it. Then when Scout asks "what the sam hill he was doing" Calpurnia interjects and "requests [Scout's] presence in the kitchen." She demands that Scout treat him like company. That is what he is. Calpurnia creates a powerful scene here, not only as a character, but as a "member" of their family.
Then at school we find that the school system puts up with the Ewell family enough so that they have to go to school for one day out of the year. They accept the family, but don't want to get involved, so it's a different type of tolerance.