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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http://www.ncsrp.org/cs/csr/print/csr_docs/achstud.htm
The National Charter School Research Project at the University of Washington has launched a new database of charter school achievement studies released since 2001. For each study, the database includes a brief summary of findings, a description of the data and methodology, grade levels included in the analysis, and a rating of the quality of evidence each study provides on charter school student achievement. Ratings are based on two criteria: how well the methodology removed non-school factors that may influence student achievement from the measurement of school impact, and how reliably findings can be generalized beyond the schools in the sample. The database can be searched by author, year of release, region, methodology, data characteristics, and method rating.
Source: National Charter School Research Project
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