To determine how the strategy of replacing principals affected student achievement in D.C. Public Schools, the Walton Family Foundation contracted with Mathematica Policy Research. The resulting study is the first to examine the impact of such a strategy on student achievement.

中文翻译：

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哥伦比亚特区公立学校替换校长对学生成绩的影响

为了确定替代校长的策略如何影响DC公立学校的学生成绩，沃尔顿家庭基金会与Mathematica Policy Research签订了合同。结果研究是第一个研究这种策略对学生成绩影响的研究。