With the passage of the Every Student Succeeds Act (ESSA) of 2015, California must integrate additional measures of student and school performance into the state-wide accountability system. To support the conversation as policymakers consider if/how to include chronic absenteeism data in the state's accountability system, PACE has conducted an analysis of the CORE Districts' student chronic absenteeism data. Chronic absence is feasible for inclusion in California's accountability measurement system using the state's approach for rating school achievement based on outcome and improvement, or alternatively through an approach that simply looks at performance in a given school year. [This memo represents work underway as part of the CORE-PACE Research Partnership.]