Which characters in the first three chapters inform Scout about proper behaviour, and how do they tell her to act?

Scout's teacher Miss Caroline tries to tell Scout how to behave; more specifically, she tells Scout her father should not read to her at night for he will not teach her properly. Calpurnia tells Scout how to behave when she invites someone to lunch, for she is not polite to the little Cunningham boy when he pours molasses all over his food. Atticus tells Scout she needn't tell Miss Caroline they read at home, explaining that "you never understand a person until you consder things from his point of view."