Twelve studies find that overall gains in charter schools are larger than other public schools; four find charter schools’ gains higher in certain significant categories of schools; six find comparable gains; and, four find that charter schools’ overall gains lagged behind traditional schools.
Source: Charter School Achievement: What We Know, July 2005 Update
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A study, released by researchers from the Harvard Graduate School of Education and Massachusetts Institute of Technology, found Boston's public charter schools significantly outperformed the city's traditional public schools in recent years. Using an observational study (which controlled for a wide variety of student factors) and a lottery study (in which students who were accepted to the charter schools were compared to students who applied to the same schools but were not accepted), the researchers found that public charter schools had a consistently positive impact on student achievement in all state subject assessments in both middle school and high school.
Date: 2008
Source: Harvard University
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