What is a chapter that shows Meg is impatient?

Impatience is one of Meg's numerous negative character traits, and she displays it on a number of occasions throughout the story. An example of this comes in chapter 1. Meg is at school, vegetating in social studies class, and the teacher asks her to identify the principal imports and exports of Nicaragua. Meg doesn't really see the point of all this:

"Who cares about the imports and exports of Nicaragua, anyhow?" she muttered.

If Meg's going to be rude, says the teacher, then she may leave the room. Meg doesn't need a second invitation and flounces out of class without a moment's hesitation. Her impatience has got the better of her once again. She is clearly a troubled girl. Yes, she's incredibly clever, but her impatience and her negative attitude towards schoolwork are seriously holding her back. The school principal, Mr. Jenkins, politely suggests that Meg needs to do something about herself if she's going to turn things round. But there is precious little evidence of that as Meg bawls out Mr. Jenkins when he broaches the subject of her absent father.