Outcomes of ISM’s School Head leadership research projects remain in routine use in the form of ISM surveys, usually in conjunction with the electronic scoring of the ISM Stability Markers®. The leadership projects’ outcomes comprise ISM Stability Marker No. 3. This article offers a brief review of the findings, all published previously in I&P. ISM’s leadership findings are divided almost evenly between “leadership points of emphasis” that high-rated School Heads routinely employ, and “leadership traits” characteristic of high-rated School Heads. Said differently, one group of findings summarized the sorts of things that Heads rated highly on leadership tended to do, while the other group of findings summarized the sorts of things that Heads high-rated on leadership appeared to be.