Student Growth Percentiles 101

Using Relative Ranks in Student Test Scores to Help Measure Teaching Effectiveness

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Abstract

One way to assess a teacher's effectiveness is to compare his or her students' achievement growth with that of other students. In cases where standardized tests are administered annually to all students, student growth percentiles provide a simple way of making this comparison because they show how each student's test-score growth ranks among academically similar students. However, student growth percentiles do not adjust for differences in student characteristics.

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