Test scores in math and reading dropped in DC Public Schools between 2008 and 2012, while they improved in public charter schools, according to a study released Wednesday.

Using the median school’s performance to determine a “typical” school, the study by the DC Fiscal Policy Institute found that the typical DCPS school showed a decline in the number of students who rated “proficient” or “advanced” on the DC Comprehensive Assessment System exams in reading and math across elementary, middle and high schools, except for the typical middle school, where the number of students proficient or advanced in math spiked from 42.7 percent in 2008 to 61.2 percent in 2012.