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eric.ed.gov har udgivet: Measures of teachers’ “value added” to student achievement play an increasingly central role in k-12 teacher policy and practice, in part because they have been shown to predict teachers’ long-term impacts on students’ life outcomes. However, little research has examined variation in the long-term effects of teachers with similar value-added performance. In this study, we investigate variation in the persistence of teachers’ value-added effects on student achievement in New York City. We separate persistent effects into general effects that improve both the subject taught (math or English language arts (ELA)) and the other area of measured achievement and subject-specific effects which improve only the subject taught. Two findings emerge. First, a teacher’s value-added to ELA achievement has substantial crossover effects on long-term math performance. That is, having… Continue Reading →