Final answer:
Scout mentions to her teacher that Walter likely hasn't seen money given to a schoolchild for lunch, highlighting social and economic disparities.
Step-by-step explanation:
Scout tells Miss Caroline that Walter has probably never seen money paid to a schoolchild for lunch in his entire life. This reflects the economic hardships faced by Walter's family in To Kill a Mockingbird, a novel that explores themes of social inequality and the innocence of childhood. Scout's observation to her teacher illustrates the innocence of children to the societal realities around them and also highlights the economic disparities that exist within her community.