Large numbers of children in the United States are not functioning at adequate levels of literacy. Students who have weak reading proficiency skills are identified as "at-risk"; failure to acquire competency early in their schooling adversely affects performance in all academic fields and limits their potential for achievement in life.…

Many English language learners (ELLs) in schools experience reading difficulties, particularly Spanish-speaking students. This is a serious problem given the tendency for struggling readers to fall further behind as they advance in school. This issue becomes more pressing as the number of ELLs enrolled in schools rises and the availability of…