A data wall is a bulletin board that visually displays student achievement and intervention results over time. It allows teachers to focus on areas of need, track successes, and codify student needs. A good data wall clearly states the problem being addressed, details the intervention being implemented, shows the effect of the intervention through data, and draws a conclusion about the intervention's effectiveness. Key elements include the school or class name, a clear problem statement, description of the intervention, displayed data showing progress, and a conclusion on whether the intervention is working. Data walls should be displayed where relevant audiences can view them, such as outside classrooms or at school entrances.