KIPP Middle Schools: Impacts on Achievement and Other Outcomes

February 27, 2013
KIPP Middle Schools: Impacts on Achievement and Other Outcomes released in February 2013 by Mathematica Policy Research shows that Knowledge Is Power Program (KIPP) middle schools have significant and substantial positive impacts on student achievement in four core academic subjects: reading, math, science, and social studies. One of the report’s analyses confirms the positive impacts using a rigorous randomized experimental analysis that relies on the schools’ admissions lotteries to identify comparison students, thereby accounting for students’ prior achievement, as well as factors like student and parent motivation.

Key findings on KIPP's achievement gains include:

KIPP middle schools have positive and statistically significant impacts on student achievement across all years and all subject areas examined.

In each of their four years of middle school, KIPP schools produced positive academic impacts on state standardized tests. Significant positive impacts are evident on average as well as for the majority of individual KIPP middle schools in the study.

The magnitude of KIPP’s achievement impacts is substantial.

In each of the four subjects studied, KIPP schools produced achievement gains large enough to have a substantial impact on student outcomes:

  • Math: Three years after enrollment, the estimated impact of KIPP on math achievement is equivalent to moving a student from the 44th to the 58th percentile of the school district’s distribution. This represents 11 months of additional learning growth over and above what the student would have learned in three years without KIPP.
     
  • Reading: Three years after enrollment, the estimated impact in reading is equivalent to moving a student from the 46th to the 55th percentile, representing 8 months of additional learning growth over and above what the student would have learned in three years without KIPP.
     
  • Science: Three to four years after enrollment, the estimated impact in science is equivalent to moving a student from the 36th to the 49th percentile, representing 14 months of additional learning growth over and above what the student would have learned in that time without KIPP
     
  • Social Studies: Three to four years after enrollment, the estimated impact in social studies is equivalent to moving a student from the 39th to the 49th percentile, representing 11 months of additional learning growth over and above what the student would have learned in that time without KIPP.

The matched comparison design produces estimates of KIPP’s achievement impacts similar to estimates of the same impacts based on an experimental, lottery-based design. Researchers found that KIPP’s achievement gains are similar for the matched comparison design and the experimental lottery analysis.

Learn more about the KIPP schools report and download the full study in the link below.


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