The document discusses the changing global landscape for 21st century teachers. It outlines several categories of change, including new learning environments that are learner-centered and utilize technology, new integrated and interdisciplinary learning content, and new types of learners who are independent, civic-minded, and part of a new digital generation. 21st century teachers must have clear standards, integrate technology, use assessment to guide learning, understand global cultures, and develop life and career skills in their students. UNESCO also outlines four pillars of learning: learning to know, to do, to be, and to live together. The document concludes by listing several types of 21st century literacies important for teachers and learners.