The National Literacy Panel on Language Minority Children and Youth systematically and rigorously examined the research on acquiring literacy in a second language. This is the executive summary of the full report, which is available for purchase through the Center for Applied Linguistics.
August, D. and Shanahan, T. (2006). Developing Literacy in Second-Language Learners: Report of the National Literacy Panel on Language-Minority Children and Youth. Center for Applied Linguistics, Lawrence Erlbaum Associates: Mahwah, NJ.