For pre-service teachers (PSTs) who have been exposed to traditional approaches, teacher education courses can be a revelatory experience in their development as educators. This study explores if Canadian upper elementary/lower secondary (grades 4-10) PSTs change their beliefs about mathematics teaching as a result of taking a mathematics methods course and how the course influenced these beliefs. Surveys were used to measure participants' mathematics beliefs, and results show that PSTs' beliefs moved to favor reform-based approaches. Qualitative data complemented the survey results, suggesting that experiencing new approaches and having the opportunity to apply them into practice are important to their development as mathematics teachers.