Margo Gottlieb is a specialist in the design of assessments for English language learners in PreK--12 settings and in the evaluation of educational programs. Having started her career as an English as a second language (ESL) and bilingual teacher, for the past two decades, Gottlieb has consulted with and provided technical assistance to governments, states, school districts, publishers, universities, and professional organizations. In 2004, Gottlieb was a Fulbright scholar, serving as a senior specialist in Chile and as an evaluator for a dual-language school in Italy; in 2002, she was a teacher educator in Brazil. She has served on numerous U.S. and state task forces, advisory committees, and expert panels in addition to presenting at over a 100 inter national and national conferences. Presently, Gottlieb is director of assessment and evaluation at the Illinois Resource Center and lead developer for World-Class Instructional Design and Assessment (WIDA), a multistate consortium. Active in Teachers of English to Speakers of Other Languages (TESOL), a global education association, she currently chairs the com mittee on the PreK--12 English language proficiency standards and has held numer ous leadership positions. Her degrees include a PhD in public policy analysis, evaluation research, and program design; an MA in applied linguistics; and a BA in the teaching of Spanish. She has published a host of assessment instruments, manuals, guidebooks, monographs, chapters, technical reports, and articles. In addition, she is a contribut ing author to a comprehensive K--5 ESL program.