Progress made by groups of tutors from departments and colleges of education in developing small curriculum units for training science teachers is described in this report of the Nuffield Foundation sponsored Science Teacher Education Project. All units under development involve student teachers in active study, for example in devising teaching materials, teaching in small teams, analyzing pupils' writings, and close, structured observation of teachers and pupils at work. Videotapes, sound recordings, and reproductions of pupils' work are an integral part of the materials being produced. The individuals involved in developing each topic group are listed, and a brief summary of their progress and plans given. Topic groups that have been established are concerned with aims and objectives of science teaching, methods and techniques/resources, teacher-pupil interactions, concept development, design of science courses, social context of science teaching, laboratory design and management, safety, and assessment and feedback. (Editors/AL)