This article measures the achievement impacts of 41 Knowledge Is Power Program (KIPP) charter middle schools nationwide and found consistently positive and statistically significant test-score effects in reading, math, science, and social studies.

This report presents the first findings from a multi-year evaluation of the Knowledge Is Power Program (KIPP), a network of charter schools for disadvantaged students. Using a matched comparison group design, results show that for the vast majority of KIPP schools in the evaluation, impacts on...