Implementation refers to the process by which an intervention is put into practice. Research studies across multiple disciplines, including education, have consistently demonstrated that interventions are rarely implemented as designed and, crucially, that variability in implementation is related to variability in the achievement of expected…

As states and communities invest in initiatives to improve the quality of early care and education, the measurement of quality is becoming more widespread and the importance of measuring quality well is gaining increasing attention. Within the broad context of interest in improving quality, this report seeks to differentiate among a number of…