The Ghanaian mathematics curriculum expects teachers to adopt technologies as an instructional tool to assist students to learn mathematics relationally. Teachers' dispositions (knowledge, beliefs, and attitudes) towards technology are critical in translating the curriculum intention into practice. This paper presents teachers' initial dispositions related to technology integration and their views about a professional development model. In this model, they worked in teams to develop and enact GeoGebra-based mathematics lessons with support from expert, exemplary materials, and demonstration lessons. The results indicate that the model of professional development is promising in engaging teachers in technology integration.