This article presents four guidelines for providing direct instruction in thinking skills in social studies and history at any grade level. The author first describes, with examples, three major components of any thinking skill that students need to know. Second, he presents teaching techniques for making these components explicit. Third, he outlines and explains two different strategies for organizing introductory skill lessons. Fourth, he describes a variety of techniques for scaffolding and cueing continuing thinking-skill practice as well as strategies for organizing different types of skill-practice lessons. He explains principles for employing these techniques and strategies throughout. He also highlights three factors teachers should consider in implementing thinking-skills instruction. The article concludes with a brief research-based rationale for infusing thinking-skills instruction with social studies and history instruction. (Contains 1 figure.)