Kim Tredick is currently the Assistant Superintendent of Educational Services in the Castaic School District in Southern California. She has served as lead curriculum writer for J Taylor Education since 2006 and has been using Depth and Complexity for three decades as a teacher, principal, and district administrator. In 2006, she was awarded the Milken National Educator award for her work with differentiation. Kim is the author of the best-selling Differentiation Smart Reference Guide, which is used in over 30,000 classrooms. As one of the original participating educators during the first PD rollout of Depth and Complexity in the 1990s, Kim provides teachers with practical, best practices for using all the components of the D & C Framework.