This is a practical guide for school leaders and teachers who have responsibility for designing and delivering a knowledge-rich and skills-focused curriculum at KS3 and KS4. It considers the elements that underpin a high-quality curriculum and how to create sequential and conceptually rich learning experiences for pupils across the secondary phase. Key topics include: (1) Tools and techniques that can support staff to develop a cohesive curriculum across every secondary subject area; (2) A focus on essential knowledge and skills within each subject; (3) Transition from primary to secondary school and the importance of KS3; (4) The role of leadership in defining curriculum vision, rationale and ambition; and (5) A review of compulsory and desirable elements of curriculum planning such as well-being and physical health.