Scout's introduction to school was terrible. Her teacher, Miss Caroline, became angry with her for already knowing how to read and write in cursive. School becomes something to be endured and even when Atticus encourages her to put herself in her teacher's place, Scout can understand her teacher's mistakes (like trying to loan money to a Cunningham), but still has trouble with her teacher's teaching methods (the "Dewey Decimal System :) )Jem tells her that school will become better as she grows older, and she observes that Jem seems to enjoy some of his studies, still school remains a burden to be tolerated.
She eventually becomes somewhat more accepting of it, or at least, resigned to it. It become routine. She no longer mocks it the way she did early on, but she still pokes fun at it from time to time, such as the discussion of current events in Chapter 26, and she still is bored/dislikes things about it (such as math class), but it becomes less of an active insult and trauma and more something she has to put up with.