Left Behind By Design: Proficiency Counts and Test-Based Accountability
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Many test-based accountability systems, including the No Child Left Behind Act of 2001 (NCLB), place great weight on the numbers of students who score at or above specified proficiency levels in various subjects. Accountability systems based on these metrics often provide incentives for teachers and
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美国国家经济研究局创建时间：
2007-08-01
