One area of research with computer-based systems for storage and retrieval of science information is the delivery of knowledge required by users rather than citations to documents which contain the needed knowledge. The purpose of this project was to identify the kinds of derivative information products needed by users of science information and to delineate characteristics of the user and his work which determine how the products should be designed. Identification of derivative information product needs was accomplished through structured interviews with 14 researchers (from three institutions) and 12 teachers (from two school systems) active in environmental science. Product design criteria were determined through case studies with two researchers and two teachers to develop products relative to their current work requirements. Researchers shared a need for eight derivative information products which were grouped into: (1) content related products, (2) method related products, and (3) special data storage and retrieval products. Four of the eight information products described by the high school teachers were similar in structure to those identified by the researchers. Specific derivative information products were prepared for the researchers and teachers by information specialists, according to their needs as determined by the case studies. Materials for teachers were selected to assist in lecture and laboratory preparation and to provide audiovisual presentations for the classroom. Results of the research demonstrated a need for derivative information products which can be prepared by information specialists on the basis of interviews with users. (Author/JAB)