This article describes the development of a joint display in a mixed methods research case study, using a theoretical framework as the start point. A case study of professional development on Web 2.0 technologies for teachers of Spanish illustrates how the qualitative results from interviews, observations, and documents, and quantitative results from pre, post, and follow-up surveys were integrated via a joint display using the TPACK model. The discussion focuses on the role of joint displays in data merging and how they facilitate the representation of fit of data integration, enriching the results in convergent designs.