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…

Thousands of schools around the country have implemented whole-school reform programs to boost student performance. This paper uses quasi-experimental methods to estimate the impact of whole-school reform on students' reading performance in New York City, where various reform programs were adopted in dozens of troubled elementary schools in the…

Longitudinal case study of reform efforts centering on the Talent Development Middle School model at low-performing, high-poverty middle school in Philadelphia. Finds that student gains in mathematics, science, and reading achievement at subject school exceeded that of students in comparable school. (Contains 19 references.) (PKP)