He teaches courses related to literacy instruction, specifically for English Language Learners (ELLs). His research areas include language and literacy acquisition and development in multi-lingual populations, understanding universal and language specific aspects of reading comprehension, cross-language transfer, and developing research-based educational programs to improve language and literacy in diverse groups of ELL children and adolescents. His research has been published in Journal of Education Psychology, Scientific Studies of Reading, Developmental Psychology, Reading Research Quarterly, Reading and Writing, Journal of Research in Reading, and Topics in Language Disorders.