Large-scale education data are collected via complex sampling designs that incorporate clustering and unequal probability of selection. Multilevel models are often utilized to account for clustering effects. The probability weighted approach (PWA) has been frequently used to deal with the unequal probability of selection. In this study, we examine…

Decades of evidence demonstrates that high-quality, well-implemented early education can positively impact the learning trajectories of vulnerable, high-needs young children. Yet, the majority of publicly-funded programs nationwide struggle to implement to quality standards with fidelity and fail to significantly advance children's early…