Effects of Dual-Language Immersion Programs on Student Achievement: Evidence From Lottery Data - Steele, JL; Slater, RO; Zamarro, G; Miller, T; Li, J; Burkhauser, S; Bacon, M (2017)
natural-experiment; evidence grade B

Effectiveness of Four Instructional Programs Designed to Serve English Learners - Valentino, RA; Reardon, SF (2015)
quasi-experiment; evidence grade C

Reclassification Patterns Among Latino English Learner Students in Bilingual, Dual Immersion, and English Immersion Classrooms - Umansky, IM; Reardon, SF (2014)
longitudinal; evidence grade C

A Synthesis of Research on Language of Reading Instruction for English Language Learners - Slavin, RE; Cheung, A (2005)
meta-analysis; evidence grade C

Effective Reading Programs for Spanish-Dominant English Language Learners (ELLs) in the Elementary Grades - Cheung, ACK; Slavin, RE (2012)
meta-analysis; evidence grade C

The Big Picture: A Meta-Analysis of Program Effectiveness Research on English Language Learners - Rolstad, K; Mahoney, K; Glass, GV (2005)
meta-analysis; evidence grade D

Second Language Learning through Immersion: A Review of U.S. Programs - Genesee, F (1985)
review; evidence grade D

Is CLIL so beneficial, or just selective? Re-evaluating some of the research - Bruton, A (2011)
critique; evidence grade D