A stanine score is also known as a standard score of 9. It is method of comparing and scoring an test to a nine point scale. It is used in various applications to score any test to a single digit test score.
In the context, as the students in the class of Mr. Enzor does not understand how to compare and interpret their scores of the test, they can convert their score to the nine point scale and can compare all the scores to that. Darby's score is 9, so she is ranked the highest in terms of Stanine scores as the highest point is 9 in a stanine scale.
They banded together because of the nomadic herders and they rebelled against them. They didn't have direct contact with each other therefor keeping everything peaceful.
