Although in Germany there exists a long research tradition concerning common instruction and inclusive education, more research is needed concerning the subject-matter specific programs for inclusive teacher education. The paper reports on the project ProViel (‘Professionalisierung für Vielfalt’ – ‘professionalisation for diversity’. Within the project inclusion is pursued as a common objective for all subjects and disciplines. In addition, sub-projects concentrate on selected subjects as ‘Mathematics Inclusive’. For this sub-project concepts and modules for teacher education will be developed, tried out and reflected with respect to inclusive mathematics. The paper presents the mathematics project’s aims and objectives, followed by data concerning the concrete course ‘Learning Mathematics with Substantial Learning Environments (SLEs)’ and primary teacher students’ practical experiences and reflections.