These women help the kids to get a perspective on their father, Atticus Finch. 

Miss Maudie in particular offers some explicit social context and communicates ideas about Atticus that Jem and Scout could not have developed on their own -  offering some history, some adult perspective, and some admiration regarding Atticus, his decisions, his character and his integrity.

• These three very different women exemplify femal strength for Scout. Calpurnia's firm hand at the Finch home helps form Scout's sense of concern for others, and her independent spirit as she witnesses Calpurnia stand up for herself and Scout and Jem.
• Aunt Alexandra reinforces the importance of loyalty to the family. In a negative way, Aunt Alexandra does not agree with all Atticus believes, but she is certainly loyal to him.
• Miss Maudie is the voice of wry wisdom for Scout and there  is much that the child learns ftom Miss Maudie.

All three women are female role models for Scout, but Miss Maudie seems to be the one that Scout looks up to the most.  She does not approve of Calpurnia or Aunt Alexandra.  She thinks they both pick on her, and they both have unrealistic expectations of her.  Yet, interestingly, Scout learns new information about all three women that serves to change her perceptions of them.  In the end, she uses all of them as models of what a woman should be, once she comes to understand them.

Miss Maudie is the example of the good neighbor. She provides a contrast to Mrs. Dubose and Stephanie Crawford, who are mean spirited and gossipy.

Miss Maudie is similar to Jem and Scout's father, Atticus, in her views and behavior. She has high moral standards, and her actions are admirable. She helps the children see that Atticus, although he might not be popular among some Maycomb residents, is a good, upright man.