Margo Gottlieb, Ph.D., is a staunch advocate for multilingual learners and their teachers. As co-founder and lead developer of WIDA at the University of Wisconsin-Madison, Margo has contributed to the design of language development standards frameworks. As a teacher, consultant, and mentor, she has worked with universities, organizations, governments, states, school districts, and schools in co-constructing linguistic and culturally sustainable curriculum and reconceptualizing classroom assessment policy and practice. Margo has been appointed to national and state advisory boards, has been a Fulbright Scholar, and has presented across the U.S. and in 25 countries. Having authored, co-authored, or co-edited over 100 publications, including 20 books and guides, Margo's 3rd edition of her best-selling book, Assessing Multilingual Learners: Bridges to Empowerment, is soon to join her Corwin compendium. Gisela Ernst-Slavit, PhD, is a Professor in the College of Education at Washington State University Vancouver. She investigates language teacher education in culturally and linguistically diverse settings using ethnographic and sociolinguistic perspectives. In addition to other publications, she is co-author of Access to Academics: Planning Instruction for K-12 Classrooms with ELLs (Pearson, 2010), From Paper to Practice: Using the TESOL's English Language Proficiency Standards in PreK-12 Classrooms (TESOL, 2009), and TESOL PreK-12 English Language Proficiency Standards (TESOL, 2006). Dr. Ernst-Slavit, a native from Peru, has given numerous presentations in the United States and Canada as well as in Japan, Pakistan, Peru, Spain, Thailand, and The Netherlands.