This report presents results from a new quantitative synthesis of research on the effectiveness and validity of test accommodations for English language learners (ELLs) taking large-scale assessments. In 2006, the Center on Instruction published a review of the literature on test accommodations for ELLs titled "Practical Guidelines for the…

A 3-year study attempted (1) to predict reading achievement through third grade, (2) to establish data for a nonverbal discrimination test, (3) to devise supplementary perceptual instructional programs, and (4) to develop screening devices to assess perceptual abilities and identify potential learning disabilities. In first, second, and third…