Atticus greeted Walter and began a discussion about crops neither Jem nor I could follow.
“Reason I can’t pass the first grade, Mr. Finch, is I’ve had to stay out ever’ spring an’ help Papa with the choppin’, but there’s another’n at the house now that’s field size.”
…While Walter piled food on his plate, he and Atticus talked together like two men.

– Harper Lee

To Kill a Mockingbird, Chapter 3. Walter Cunningham Jr. is having lunch with the Finch family and explains to Atticus that he has been unable to pass first grade yet is because he has to help his father Walter with the crops. Atticus is very respectful of young Walter and treats him like an adult.