This paper reports on an analysis, using a conceptual framework and NUD*IST software, of a cohort of 3rd-year teacher education students' reflections on changes in their mental models following their experiences in a problem-based learning (PBL) topic. Results provide evidence that students do report changing mental models in areas such as (a) the value of case studies for engaging with subject content, motivating learning, and connecting theory with practice; (b) self-reflection and peer collaboration for cognitive and professional growth.