Instructional leadership is a primary task of school leaders, but this work may be complicated when leaders and teachers do not share content area or grade level expertise. Work around leadership content knowledge (LCK) acknowledges that school leaders cannot know everything about teaching in the content areas, but suggests leaders can work to bridge this divide. Still, little is known about how leaders' LCK intersects with their efforts to support improvements in teaching and learning. The purpose of this study was to explore ways in which LCK facilitates or, in its absence, hinders instructional leadership efforts. Thirty-one teachers and school leaders were interviewed about experiences receiving or providing instructional feedback. Analyses revealed factors that teachers perceived as foundational to instructional leadership efforts. Further, depending on their LCK, school leaders enacted a range of roles and provided different types of feedback.