This summer the Nuffield Foundation intends to finish developmental work on a project to produce complete teaching programs in physics, chemistry, and biology for the 11–16 age group. The project was inaugurated late in 1961 when the Nuffield Foundation set aside an initial sum of £250 000 (since increased to £430 000) to develop new science curricula for schools in England. The following year, a start was made on a physics course suitable for children in the 11–16 age group in grammar schools, corresponding to the British O‐level stage. Subsequently, classroom trials were made of the draft material and continued during the succeeding year, with suitable revisions made both in curriculum and in various pieces of apparatus. Altogether, some forty‐nine schools, representing 164 classes, participated in the 1964–65 program, and arrangements are now being made with the Department of Education and the General Certificate of Education Examining Boards for special Nuffield examinations at the O‐level. Among the principles that have guided the courses are that physics should be taught for understanding and that the subject matter should be limited in quantity to a few important ideas which the pupil can make his own. The program seeks to build upon natural curiosity, to have the student learn by doing by providing an abundance of apparatus, and to give a broad picture of what modern science is and the way in which scientists think. A further aim is to present science as a part of general education for the non‐specialist and at the same time provide a good foundation for the future scientist and engineer. The work of the American Physical Science Study Committee, though it has both stimulated reform in England and influenced thinking on the Nuffield project, is not expected to be widely used there due to the different requirements and traditions of science teaching in Britain.