She earned her D.Sc. at the Johns Hopkins Bloomberg School of Public Health. At Beloit College, she teaches courses in human biology, microbiology, emerging infectious diseases and global health. Professor Fass has focused her work on changing science pedagogies, and on using public health issues to motivate learning in STEM fields. She collaborates with the BioQUEST Curriculum Consortium and has been a faculty member at the SENCER (Science Education for New Civic Engagements and Responsibilities) Summer Institute since 2001. She is the author of the SENCER Slow Food model course. She is a co-author, of Microbes Count!: Problem Posing, Problem Solving and Peer Persuasion in Microbiology and has just completed case investigation book for public health/ global health called Global Health Has Now Borders: Case Investigations (Fass, Seiter, Stanley and Waterman), published free as an issue of Biology International, http://www.iubs.org/publi/bi.html.
Professor Fass works closely with community groups interested in reducing racial disparities in infant mortality in cities in Wisconsin, and is also developing student projects that build on the emerging field of health literacy. These interdisciplinary projects provide great opportunities for student engagement. She served as Chair of the Undergraduate Education Section of the American Society for Microbiology and a Senior Faculty Associate with the SENCER Project (Science Education for New Civic Engagements and Responsibilities) funded by NIH. Prior to coming to work at Beloit College, Marion Fass was the director a WELCOA Award winning wellness program that served a diverse employee population. Professor Fass also taught in the University of Wisconsin Medical School Department of Family Medicine and Practice, where she focused on teaching health education skills to residents.