This textbook presents a theoretical overview of the idea of Outcome Based Education (OBE), together with research and practical inputs for practitioners. It discusses the evolution of the ideas of OBE, Aligning Outcome and Curricular Content, Aligning Outcome and Modes of Transaction, and Aligning Outcome and Evaluation. It also provides practical guidelines with illustrations on how to design courses and curricula for school education, as well as higher education, using the OBE Framework. It serves as a useful guide for students, teachers of all levels, teacher educators, and other educational practitioners.