When Scout learns about the Cunningham juror what does she say will do as soon school starts?

Scout doesn't say she will do anything specific about the Cunningham juror when school starts. She is confused by the situation, and her main reaction is to realize that there is a lot she doesn't understand about the world.

Here's what happens:

* Scout is surprised to learn that one of the jurors in Tom Robinson's trial was a Cunningham. This is significant because the Cunninghams are the family that Atticus defended in the past, and they are seen as generally good, honest people.

* Scout's realization about the Cunningham juror leads her to question her own assumptions about people. She starts to understand that people are complex and that there are many different sides to every story.

What Scout does say:

* She tells Jem, "I guess it's like everything else, you can't just do things the way you want to." This shows her growing awareness that the world is not always black and white and that people have to make compromises.

* She also says, "I never figured out how Miss Maudie knew everything... but I guess I just never thought about it." This is her acknowledging that she still has much to learn and that she can't always rely on what she thinks she knows.

While Scout doesn't explicitly state what she will do when school starts, her reflections on the Cunningham juror show her growing maturity and her ability to see the world from a more nuanced perspective.