Schools are using various forms of professional learning communities (PLCs) in order to increase student achievement and improve educational practices through enhanced communication and collaboration among teachers. This study examined a PLC that had too narrow a focus and failed therefore to affect student achievement. A critical shortcoming of the PLC groups examined in the current study had to do with their narrow mission and definition as "Data Teams" and consequentially a constricted focus on narrow metrics. A qualitative case study design was used to gather data through 6 interviews with PLC members and 3 observations of the PLC meetings. Interview data were coded and thematically analyzed based on the research questions posed in the study. The observational data were analyzed using pre-determined categories. The results indicated that the participants perceived the PLC, in its current state, as too focused on a single set of metrics and lacking the time, collaboration, and support needed to be effective.