The conference proceedings "Mathematical Preparatory and Bridge Courses" provide a comprehensive analysis and discussion of the various aspects of mathematical preparation for students. It highlights the goals and teaching-learning concepts pursued in these courses, as well as the supportive measures implemented during the initial phase of studies. The volume also includes information on assessments and diagnostics that are important for evaluating learning progress. Additionally, current projects in this field are presented, offering both empirical and theoretical-conceptual perspectives on mathematics didactics. The content is designed to provide an outlook on the future development of preparatory and bridge courses, thus making a valuable contribution to the discussion on mathematical education.