This article proposes a latent variable regression four-level hierarchical model (LVR-HM4) that uses a fully Bayesian approach. Using multisite multiple-cohort longitudinal data, for example, annual assessment scores over grades for students who are nested within cohorts within schools, the LVR-HM4 attempts to simultaneously model two types of…

The Language Vocabulary Acquisition (LVA) Approach is a revolutionary method of reading instruction for emergent and developing readers. It is an intense reading program with high levels of student participation, engagement, and interaction with print text, that yields high outcomes in phonological awareness, reading and writing fluency, and…