This poster reports on a study of a group of mathematics teachers’ learning experiences in an explicit professional development (PD) program. In order to recognize and interpret the complex processes underlying teacher learning, the Interconnected Model of Professional Growth (ICMPG) of Clarke and Hollingsworth (2002) was used as a tool for communication between the participating teachers and the researcher. Findings indicate that the teachers identify learning outcomes and their own learning trajectories, however they also emphasize various elements apparently connected to concrete challenges they each experience in their professional work.