Using input and outcome data from a randomized study of dual-language immersion programs in an urban district, we examine the mediating relationships of dosage, expenditures, and classroom characteristics to students' academic performance, and the moderating role of students' race/ethnicity. Differential costs of immersion were concentrated at the…

Schools are under increasing pressure to reclassify their English learner (EL) students to "fluent English proficient" status as quickly as possible. This article examines timing to reclassification among Latino ELs in four distinct linguistic instructional environments: English immersion, transitional bilingual, maintenance bilingual,…

We use data from one of the few states where information on curriculum adoptions is available--Indiana--to empirically evaluate differences in performance across three elementary-mathematics curricula. The three curricula that we evaluate were popular nationally during the time of our study, and two of the three remain popular today. We find large…

Using hierarchical linear modeling, student standardized test scores are analyzed to determine the impact of mentoring first- and second-year teachers on their students' achievement. The contrasting group used for comparison consists of experienced teachers in matched schools, grade level, and content area. The study contains data from 300…

Although literacy skills needed to engage in the economy and public life have grown, the literacy skills of many adolescents remain low. One popular approach to improving student literacy is using school-based reading coaches; however, there is little empirical evidence regarding the nature of coaching and its effectiveness in changing teacher…

An investigation was made of standard, nonexperimentally administered Head Start programs in the Philadelphia School District. Findings replicate and extend past findings that Head Start children more often avoided serious school problems than did control children. Head Start children were less frequently retained as they moved through the…