Sonia W. Soltero is Professor and Chair of the Department of Leadership, Language, and Curriculum, and former Director of the Bilingual-Bicultural Education Graduate Program at DePaul University in Chicago. She has been involved with dual/bilingual education for more than thirty years as a dual language teacher, university professor, professional developer, and researcher.

Dr. Yvonne Freeman and Dr. David Freeman are professors emeriti at The University of Texas Rio Grande Valley. Both are interested in effective education for emergent bilinguals. They present regularly at international, national, and state conferences. They have worked extensively in schools in the U.S. They have also worked with educators in Ecuador, Mexico, Colombia, Venezuela, Costa Rica, Argentina, Uruguay, Hong Kong, India, Indonesia, Lithuania, Mallorca, and Sweden.

The Freemans have authored books, articles and book chapters jointly and separately on the topics of second language teaching, biliteracy, bilingual education, linguistics, and second language acquisition. Their most recent book published in January 2020 is Equitable Access for English Learners Grades K–6: Strategies and Units for Differentiating Your Language Arts Curriculum published by Corwin.

Their other recent books, published by Heinemann, include Dual Language Essentials for Teachers and Administrators 2nd edition (2017), ESL Teaching: Principles for Success 2nd edition (2016), Essential Linguistics: What Teachers Need to Know to Teach ESL, Reading, Spelling, and Grammar, 2nd edition (2014).