Following up yesterday's post on NYC's formula for elementary schools' "peer index," here's how it works for middle schools:
(Average 4th grade English and Math proficiency) -
(2 X % students with disabilities) = Peer Index
In contrast to the elementary formula, race, poverty and ELL status aren't considered. I guess the theory is race and class heavily affect your starting point in kindergarten and then have no ongoing effects? If you've caught up by 4th grade it's all good?