This report offers a comprehensive discussion of the issues related to ELLs and high-stakes assessments, including the rationale for including ELLs in high-stakes testing, selection of appropriate accommodations, and recommendations for preparing ELLs for high-stakes testing and interpreting test data realistically.
Coltrane, B. (2002). English Language Learners and High-Stakes Tests: An Overview of the Issues. Washington DC: Center for Applied Linguistics.