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Researchers and policymakers often assume that teacher turnover harms student achievement, but recent evidence calls into question this assumption. Using a unique identification strategy that employs grade-level turnover and two classes of fixed-effects models, this study estimates the effects of teacher turnover on over 850,000 New York City 4 th and 5 th(More)
Although a linear relationship between age and utterance length during the preschool years has been reported, that result was only partially replicated from age 2 to 5 years in two new research samples, one cross-sectional and the other longitudinal in design. Instead, a deceleration in age curves, particularly beyond about 36 months, was observed in each(More)
Insulin induced neuropathy has been reported previously in people with diabetes treated with insulin, and subsequently reported in patients with insulinomas. However, neuropathy caused by rapid glycaemic control in patients with poorly controlled diabetes with chronic hyperglycaemia is not a widely recognised entity among clinicians worldwide. It is(More)
Executive Summary Education policymakers at both the state and federal level are struggling to identify ways to improve the academic achievement of public school students. Faced with the substandard academic performance of some student groups and the persistence of achievement discrepancies between certain racial, ethnic and socioeconomic groups of(More)
We are grateful to the New York City Department of Education and the New York State Education Department for the data employed in this paper. We benefited from insights by Vicki Bernstein and Mark Thames. We also thank the program directors and other administrators who provided us with details of their preparation programs. Thanks to participants at the(More)
We are grateful to the New York City Department of Education and the New York State Education Department for the data employed in this paper. We appreciate financial support from the Noyce Foundation and the National Center for the Analysis of Longitudinal Data in Education Research (CALDER). CALDER is supported by IES Grant R305A060018 to the Urban(More)
In this paper, we describe the results of the first large-scale study, based on a unique data set from North Carolina, assessing the relationship between the certification of teachers by the National Board for Professional Teaching Standards (NBPTS) and elementary-level student achievement. Our findings indicate that NBPTS is successfully identifying the(More)