This study was conducted to determine how librarians answer reference queries, and to develop instructional materials for teaching the answering process. Twenty-three science and technology reference librarians used and commented on a six-step model of the search strategy process. The model was then revised to include the following steps: (1) message selection; (2) selection of types of answer-providing tools; (3) selection of specific answer-providing tools; (4) selection of search headings; (5) answer selection; and (6) negotiation and renegotiation. An instructional module was developed for each step consisting of description and practice exercises. The modules were tested in three graduate library school reference courses, and revised according to faculty and student comments. The author recommended the development of guidelines for choosing lead-in tool search sequence and specific answer-providing tools, and stressed the need for empirical research. The appendices include the instructional modules, a survey of public library reference queries, and a computer-searched and printed index to reference queries. (KP)