Fostering sustainable improvements in undergraduate education remains a formidable challenge. To address this challenge, our team has developed the Departmental Action Team (DAT) model. DATs are small working groups of faculty, students, and staff, that work collaboratively to envision, plan, develop, and build sustainable structures in their department. To support the uptake of such structures, DATs collect and analyze data to reflect on the root causes of an issue, which they use to shift beliefs, values, and practices within their context. This paper provides a five-year status report on the DAT project. We describe the history of the model, its evolution over time, and its impact on a variety of departments.