ELL study

Research on Educating ELLs Draws Surprising Conclusions

The summer issue of American Educator examined two recent
reviews of research on educating English Language Learners (ELLs).
Currently, one in nine public-school students in K-12 is an ELL, and
demographers estimate that in twenty years that proportion could
swell to one in four. Stanford education professor Claude
Goldenberg says the research suggests that teaching students to
read in their first language promotes higher levels of reading
achievement in English.
Goldenburg, C. (2008, Summer). Teaching English language learners. American Educator, 8-44.
http://www.aft.org/pubs-reports/american_educator/issues/summer08/goldenberg.pdf