This paper describes the development of the design and technology component of the National Curriculum of England and Wales from its inception in 1988 to its current form in 1995 and the influence of the Nuffield Design and Technology Project in this process. The paper discusses the Nuffield approach to four important issues – breadth and balance, continuity and progression, differentiation and clarity of content. The paper discusses the role of the teacher and identifies four important features required for successful teaching. The paper describes the work of the Project in providing continual professional development for design and technology teachers including the work of area field officers to support teachers who are using the Project publications.