How does Scouts reaction show that she disagrees with Atticus?

We see that Scout doesn't agree with Atticus when she realizes that Burris Ewell only has to go to school on the first day, and she can be just like him.

I was bursting with a sudden thought. “Burris Ewell, remember? He just goes to school the first day. The truant lady reckons she’s carried out the law when she gets his name on the roll-”