Carol Ann Tomlinson is William Clay Parrish Jr. Professor Emeritus at the University of Virginia's School of Education and Human Development. The author of more than 300 publications, she works throughout the United States and internationally with educators who want to create classrooms that are more responsive to a broad range of learners.

Carol has authored several books for ASCD, including How to Differentiate Instruction in Mixed-Ability Classrooms, The Differentiated Classroom, and (with Caroline Cunningham Eidson) Differentiation in Practice: A Resource Guide for Differentiating Curriculum, Grades 5–9. She consulted on and authored facilitator's guides for ASCD video staff development sets and developed ASCD's Professional Inquiry Kit on Differentiated Instruction.