According to a study of lottery data, students who apply to charter schools, on average, scored higher in the previous year than the students who didn't submit an application. (nydailynews.com)
Recent studies using lottery data — that is, comparing applicants who gained a seat in a charter school versus those who were turned away — show positive impacts on student test scores. (gse.harvard.edu)
In some cases, lost records are also a result of bad luck and the fact that the preservation of lottery data is not a priority after the school admissions process is complete. (academic.oup.com)