The ISBE said 6.5 percent of Robertson Charter School students taking the Partnership for Assessment of Readiness for College and Careers (PARCC) exam in 2016 passed, in comparison to the 4 percent passage rate in 2015.
Meanwhile, the school posted an average spending rate of $11,038 per pupil, below the state's average of $12,821.
The PARCC test is a state-mandated exam used to assess the school and student performance in several states nationwide.
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