News & Press

December 2, 2008

Teacher Turnover, Tenure Policies, and the Distribution of Teacher Quality

Can High-Poverty Schools Catch a Break?

By Raegen Miller & Robin Chait of the Center for American Progress

In recent years education reformers have focused a great deal of attention on strategies for enhancing teacher quality. This attention makes sense, as a growing body of evidence points to the overriding importance of teachers in promoting student achievement.

On average, students with a teacher in the top quartile of the talent pool achieve at levels corresponding to an additional two or three months of instruction per year, compared with peers who have a teacher in the bottom quartile.

Putting these numbers in context, this quality differential represents well over a third of the “achievement gap” between students from low-income families and those from families with higher incomes. Thus, consistent assignment to high-quality teachers can substantially lower the barriers to realizing academic success imposed by poverty.

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