What were the many things that scout learned about injustice during her day as a spectator in court?

In To Kill a Mockingbird in chapter 23, there are a couple of cases of minutes when Scout and Jem discover that the grown-up world has more than its offer of treacheries. One illustration is when Aunt Alexandra calls Walter Cunningham "waste." And Scout is subjected to this dogmatism after Calpurnia had advised her to treat everybody similarly. This is plainly an illustration where Calpurnia is appeared to be more liberal.