Carol Ann Tomlinson‘s career as an educator includes 21 years as a public school teacher. She taught in high school, preschool, and middle school, and worked with heterogeneous classes as well as special classes for students identified as gifted and students with learning difficulties. Her public school career also included 12 years as a program administrator of special services for advanced and struggling learners. She was Virginia’s Teacher of the Year in 1974. She is professor of educational leadership, foundations, and policy at the University of Virginia’s Curry School of Education; a researcher for the National Research Center on the Gifted and Talented; a codirector of the University of Virginia’s Summer Institute on Academic Diversity; and president of the National Association for Gifted Children. Special interests throughout her career have included curriculum and instruction for advanced learners and struggling learners, effective instruction in heterogeneous settings, and bridging the fields of general education and gifted education. She is author of over 100 articles, book chapters, books, and other professional development materials, including How to Differentiate Instruction in Mixed-Ability Classrooms, The Differentiated Classroom: Responding to the Needs of All Learners, Leadership for Differentiated Schools and Classrooms, the facilitator’s guide for the video staff development sets called Differentiating Instruction, and At Work in the Differentiated Classroom, as well as a professional inquiry kit on differentiation. She works throughout the United States and abroad with teachers whose goal is to develop more responsive heterogeneous classrooms.