Advanced Biology
Biology AP
Chemistry AP

Ms. Marilynn Sefranek, has been working at Gross Catholic since 2003, has a bachelor's degree from University of Nebraska Omaha and is working on her Masters Degree in Education Administration through Creighton University.  Ms. Sefranek has many duties at Gross, including teaching AP Biology, AP Chemistry, Freshman Advanced Biology and moderating Chemistry Club.  Ms. Sefranek has lived in Omaha for most of her life. She has 2 children.