In recent years educators and policymakers have set a goal that students graduate from high school ready for college and careers. However, as a nation we are far from achieving this goal, particularly for low-income and minority students. For example, in states where all eleventh-graders take the ACT[R], only 27 percent of low-income students in…

Many educational researchers have identified issues on classifying schools and some have made use of ad-hoc classification systems in their analyses; however, these solutions are generally one-dimensional, which prohibits them from capturing the full breadth of variation among schools. To understand the amount of variation that exist in schools…