He is an internationally recognized leader in the field of literacy education with previous work experience in Singapore and Australia and whose expertise centers on reading improvement, literacy teacher preparation, language diversity, and differentiated literacy instruction.
He has published over 130 manuscripts that substantiate some of his contributions to the field including:
- Book series: Literacy, Research, Practice and Evaluation
- President, Specialized Literacy Professionals SIG of the International Literacy Association
- Section Editor, Journal of Adolescent & Adult Literacy