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Deconstructing the EL Gap

Across U.S. schools, students classified as English learners (ELs) tend to achieve lower educational outcomes than their non-EL peers. What explains these differences? Are they a product of ELs’ developing English language proficiency and/or the services they receive at school, or do other factors play a role? The authors of this study attempt to deconstruct the “EL gap” in Massachusetts by examining the extent to which differences in outcomes between ELs and non-ELs can be attributed to factors that are unrelated to a student’s English proficiency or receipt of EL services.

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Professional Development at Scale: The Causal Effect of Obtaining an SEI Endorsement Under Massachusetts’s RETELL Initiative

This project used longitudinal data from Massachusetts to measure the causal effect of a rigorous and time-intensive professional development (PD) delivered at a nearly unprecedented scale: teachers earning an endorsement in Structured English Immersion (SEI) under the Massachusett’s Rethinking Equity in the Teaching of English Language Learners (RETELL) initiative.

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