This article presents a case in point of an inquiry community in a professional development school (PDS). The community (supported by an "Inquiry in the PDS" graduate seminar) spanned institutional boundaries and involved a range of PDS partners who collaboratively studied their own practices. The article describes the community and shares insights reported by eight participants. Four lessons were learned from the participants' insights: first, that making an inquiry community a core mechanism for collaboration in a PDS can transform existing relationships; second, that an inquiry community can be used to build purposeful connections among and beyond PDS partners; third, that an inquiry community can offer PDS partners opportunities to fashion new professional identities; and fourth, that inquiry communities can develop new understandings of what it means to be a "PDS partner." The article's core contribution is an example of how an inquiry community can support partnering in PDS work.