She ignored them so maybe they will leave her alone and forget about her.
Because the boys think that maybe if Dorothy shows that she don’t like them
tree stumping her they will do it more. But if she ignores them they will think that she doesn’t care about them and they will leave her alone.
I think that Dorothy tries to ignore the guys when they tease, tree stump her, and attack her because Beans told his gang that he want him to make Dorothy scream or laugh or cry or kick or sling a book bag. So, I think that she heard Beans say that and she would try and not scream or laugh or cry or kick or sling a book bag.