The document summarizes Carol Ann Tomlinson's work on differentiated instruction. Tomlinson is a professor who researches curriculum and instruction for academically diverse learners. She defines differentiated instruction as using flexible instructional approaches to modify content, process, and products based on students' learning readiness, interests, and profiles. The document notes that students have diverse needs, styles, backgrounds and interests that teachers can accommodate through differentiated approaches to content, process, products, and learning environments. It poses questions about the benefits and challenges of implementing differentiated instruction.