In this paper I discuss how the faculty and administration of the Science and Mathematics Department at Columbia College Chicago, in where I worked for thirteen years, promote diversity and multiculturalism in the department, and in their classrooms through teaching and learning. I provide examples at the departmental level and at the classroom level of the some instructional strategies my colleagues and I have composed and applied in classroom teaching and management. But first, I will give a brief summary of the nature of the institution where I taught for a long time and the kinds of students and courses we have been teaching.