This paper describes a plan to improve school effectiveness in the Tulsa (Oklahoma) Public Schools by incorporating instruction in thinking skills. The program selected by the school district was the Strategic Reasoning Program, based on Albert Upton's Design for Thinking and J. P. Guilford's Structure of the Intellect. The Strategic Reasoning program is based on instruction in six thinking skills: (1) "thing-making" (conceptualization), (2) qualification, (3) classification, (4) structure analysis (relation of parts to whole), (5) operation analysis, and (6) seeing analogies. It is implemented in four stages: (a) introduction to the six thinking skills; (b) use of these skills to solve problems; (c) transference of thinking skills to interdisciplinary subject matter; and (d) application of thinking skills to analyzing and solving real-life problems. The program is integrated into regular curricular programs such as English or reading. Teacher and learner responses to the program in Tulsa have generally been positive, but extensive preparation and teacher training are required to implement it properly. The paper concludes with observations on the appropriateness of instruction in thinking skills to the ongoing transition from an industrial to an information-based society. (TE)