Curriculum 21: Essential Education for a Changing World is a thought-provoking book on curriculum design by Heidi Hayes Jacobs. It explores the need for a new approach to curriculum in the 21st century, one that prepares students for the challenges and opportunities of a rapidly changing world. The book advocates for a curriculum that emphasizes essential skills, global awareness, and interdisciplinary learning. It offers practical strategies and examples for designing curriculum that is relevant, engaging, and meaningful for students in today's society.