The theoretical component of the course includes two one-hour theory classes per week, focusing on the interpretation of phase diagrams, geochemical data, thermodynamics, and tectono-magmatic associations. Most lectures include one or two breaks where students practice the new material on worksheets to facilitate questions. After each lecture, students complete short online quizzes to reinforce their understanding. The practical aspect of the course comprises nine three-hour labs focused on optical petrographic microscopy, accounting for 40% of the final grade. Students examine approximately 150 thin sections from fully-described reference collections, test their knowledge with independent assignments, and receive feedback by the next lab session. Each student has access to their own microscope for the duration of the course, and the reference collections are available for additional study outside lab hours. A group project integrates the laboratory and theoretical components of the course, challenging students to deduce the tectonic origin of a rock suite and defend their conclusions before their peers.