Background: Ability grouping has resurged in U.S. schools despite long-standing debates over its consequences for educational equity. Proponents argue that it is the best response to variation in academic skills because it allows teachers to customize the content and pace of instruction to students' diverse needs. Critics answer that this practice…

Background: Educational outcomes for language minority (LM) children are of great concern across the nation because these students have lower grades, are rated by their teachers as having lower skills, perform worse on standardized tests, and are more likely to drop out than are non-LM students. Given this context of underperformance, there is a…