Meta-analytic studies of second language (L2) learning typically employ a classic approach to meta-analysis. Although the classic approach can clarify findings, a multivariate, multilevel meta-analysis (3M) approach increases transparency by accounting for (a) dependencies in the evidence presented by primary studies, (b) methodological…

High-quality oral language interventions support children's readiness for formal literacy instruction, and yet guidance for multilingual classrooms is not available. To address this gap, we drew on the empirical literature on linguistically diverse learners, classroom linguistic environments, and usage-based theories to identify principles for…

According to the Michigan Department of Education, between 2011 and 2017, the number of multilingual learners (MLs) enrolled in K-12 schools in the state increased by more than 50%. In 2017, the average teacher to ML ratio in the state was an alarmingly low 1:168. To increase the number of teachers prepared to effectively serve MLs, we developed…