The increase in students opting out of standardized tests is a threat to accurately measuring student achievement. This brief examines the effects of opting out in the CORE districts and models how it could affect accountability measures. More opt-outs could significantly impact some metrics, but the growth measure is largely unaffected. Metrics tracking achievement by cohort are at risk of bias, even with low levels of opting out. Adjusting for characteristics of students who take the tests could be a solution.

This study examines the impact of target setting for non-academic indicators on school quality ratings in CORE districts' elementary schools. The authors found that non-academic measures of school quality vary over time, are not consistently associated with demographics, and are sensitive to small changes in rating thresholds. The results suggest a need for more research on target setting for non-academic indicators in school quality systems.