Margo Gottlieb, Ph.D., has been a bilingual teacher, coordinator, facilitator, consultant, and mentor across K-20 settings. Having worked with universities, organizations, governments, states, school districts, networks, and schools, Margo has co-constructed linguistic and culturally sustainable curriculum and reconceptualized classroom assessment, policy, and practice. As co-founder and lead developer of WIDA at the University of Wisconsin-Madison in 2003, Margo has helped design and contributed to all the editions of WIDA’s English and Spanish language development standards frameworks and their derivative products. She has been appointed to national and state advisory boards, served as a Fulbright Senior Scholar, and was honored by the TESOL International Association in 2016 for her significant contribution to the field. An avid traveler, Margo has enjoyed keynoting and presenting across the United States, territories, and 25 countries. Having authored, co-authored, or co-edited over 100 publications, including 22 books, Margo′s 3rd edition of Assessing Multilingual Learners: Bridges to Empowerment (2024) and Collaborative Assessment for Multilingual Learners and Teachers: Pathways to Partnerships (with A. Honigsfeld, 2025) are the latest additions to her Corwin compendium. In 2025, Margo was inducted into the Multilingual Education Hall of Fame. Dr. Gisela Ernst-Slavit (PhD University of Florida) is a Professor Emerita at Washington State University with an active program of research. Dr. Ernst-Slavit is a native from Peru who grew up languaging in Spanish, German and English at school. She is the author, co-author, or co-editor of 12 books and over 100 articles and chapters, and she frequently speaks at regional, national, and international conferences on multilingual learner education, with a particular focus on teacher preparation for multilingual youth. Dr. Ernst-Slavit has served as President of the Washington Association for English to Speakers of Other Languages and as an officer in several professional organizations, including the American Educational Research Association, the Council of Anthropology and Education, and TESOL International Association.