Every day, Calpurnia visits the Finch household which holds Atticus and his two children, Jem and Scout. She isn't considered a "slave" or "servant", but more of a mother.
She serves as the maid and cook in the house, and stands as the mother figure and a very admirable role model in the family. She is very wise and humble. She teaches the children many aspects of life and educates them about important qualities, such as race and compassion.
Every morning, Cal cleans up the household and cooks food for the family. She provides the children their daily needs, and is very caring for them.
Calpurnia helps with Scout's reading and education daily. She also helps Jem, and she teaches both of the kids very valuable lessons.
On Sunday, Cal brings the children to her church specifically for African-Americans. Despite that people judge her, she still brings the children anyways. She believes that it is a good idea for the children to learn about the African-American community.
Calpurnia stands as a strong role model for the children daily. She encourages them to do their best and teaches them many life lessons about staying kind-hearted and compassionate. She continues to resemble a motherly-figure, and the children strongly admire her and look up to her.