This form of early tracking, or dividing children into labeled groups based on the teacher's designation of their skill level, seems innocent. What we know, however, based on mounds of research-most notably among them Rist's (1970/2000) study of same-raced children of various social classes-is that teacher and peer expectations for academic achievement (and their subsequent treatment of students) are based largely on low and negative perceptions of the poor, regardless of their actual ability. We know that disproportionate numbers of poor children are far more likely to be identified as less academically adept or even as having special needs. The early tracking and labeling of children reared in poverty is cumulative and devastating. It not only hampers students' self-esteem and cripples their own expectations of themselves but also, as Rist (1970/2000) discovered, becomes a self-fulfilling prophecy for what too often becomes a trajectory of underachievement.
I agree with the authors that the definition of a poor child is cumulative and destructive, and as I mentioned in an earlier comment I think many poor children will give up as a result. External displays of disrespect and the blows they receive in life can diminish their self-esteem and self-worth, but not all children from poor families actually do poorly in school.