Project Activities
The research team identified 83 randomized control trials that met the study's inclusion criteria and used meta-analysis to identify malleable factors that explain program effectiveness.
Structured Abstract
Setting
The systematic review included 83 studies that evaluated programs designed to support ELs set in school settings (prekindergarten through 12th grade) using a randomized control trial design.
Sample
The sample included 83 studies and 819 effect sizes.
The researchers included studies that evaluated the impact of a program designed to support EL student learning. Eligible programs included those with the explicit goal of improving EL student learning and achievement outcomes.
Research design and methods
Researchers included studies that used a randomized controlled trial design.
Control condition
Studies included a treatment-as-usual or no-treatment control condition. Studies that used a one-group, pretest-posttest design were excluded.
Key measures
Researchers included studies that measured EL students' English language development, literacy, mathematics, science, and social studies learning outcomes.
Data analytic strategy
Systematic review and meta-analysis, including correlated and hierarchical random effects meta-regression with robust variance estimation, were the primary methods used to implement this study.
Key outcomes
This section will be updated when key outcomes are published.
People and institutions involved
IES program contact(s)
Project contributors
Products and publications
Project website:
Study registration:
Publications:
ERIC Citations: Find available citations in ERIC for this award here.
Select Publications:
IES Research Blog
Williams, R. (2023, April 24). English Learners: Analyzing What Works, for Whom, and Under What Conditions? Inside IES Research.
Proceedings
Williams, R. T., Garrett, R., Polanin, J., R., Zhang, Q., Hsin, L., Augilera, C., Cohen, E., Hoon Lee, D., Majeika, C., and Sejdijaj, A. (2022). Examining heterogeneity in English Learner program effects with meta-analysis. Poster presented at the annual conference of the Association for Education Finance and Policy, Denver, CO.
Questions about this project?
To answer additional questions about this project or provide feedback, please contact the program officer.
