Most school leadership teams don't fail because of a bad strategy. They fail because of what happens — or doesn't happen — in the room where decisions get made. The Five Dysfunctions of a Team gives school leaders a clear framework for diagnosing what's holding their senior team back, from the absence of vulnerability-based trust at the base to inattention to shared results at the top. In this post, we break down each dysfunction through the lens of school leadership, name what each one looks like in practice, and offer concrete steps for building a team that can trust, debate, commit, hold each other accountable, and focus on what matters most.