Compare quartile distributions of district-level measures for student performance, student demographics, and other characteristics between 2002 and 2011. Note that the quartiles shown here were calculated using only non-zero values of the distribution for each variable within each year. Cut points for quartiles are shown in the legend. Data are absent for any grade within a district with fewer than 10 students (OSPI doesn't report those figures, due to confidentiality reasons).
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