Richard M. Cash, Ed.D., is a highly sought-after presenter and professional developer who has worked with schools throughout the United States and internationally. Previously, he taught elementary, middle grade, and graduate students for over twenty years, and served as director of gifted programs for the Bloomington Public Schools in Minnesota. He is the author of "Advancing Differentiation: Thinking and Learning for the 21st Century "and coauthor of "Differentiation for Gifted Learners: Going Beyond the Basics." Richard lives in Minnesota.