St. Mary's School Marathon, Wisconsin, Excellence in Education, Home of the Eagles


St. Mary's is committed to helping all students succeed and have additional staff to assist all students in the areas of academics, behavior, and social needs.


Mrs. Kelly HahnMrs. Kelly Hahn
Educational Interventionist

Hello, my name is Kelly Hahn. I am the second grade teacher at St. Mary’s School, where previously I have taught 5-Year-Old Kindergarten and am currently the Educational Interventionist. I earned a BS degree from UW-Madison, and a MAE degree from Marian University.
My husband, Matt, and I grew up in Sun Prairie, WI. After living in the suburbs of Minneapolis, Chicago, and Madison, we made our home in Marathon. Our four children all attended St. Mary’s School.  When I’m not at school, you can find me spending time with my family, restoring our old home, gardening, supporting the arts, or cheering on the Green Bay Packers and Wisconsin Badgers. 

Phone Extension: 301


Hi, my name is Sandi Eckardt.  I grew up on a farm in Athens.  I enjoy helping others and was a CNA and later became a teacher’s aide at St. Mary’s.  I live in Rib Falls with my husband, Gary and have two daughters, Deveney and Sierra.  Both attended St. Mary’s School and graduated from Marathon High School.  I enjoy baking, reading, gardening, and making quilts.



Mrs. Sandi Eckardt Mrs. Sandi Eckardt
Teacher Aide



Mrs. Kelly Gilchrist
Teacher Aide


Hello, my name is Kelly Gilchrist.  I am working as a Teacher's Aide here at St. Mary's. I attended St. Mary's School along with my three siblings and graduated from Marathon High School in 2006. I then attended UW-Marathon County where I played on the Women's Basketball Team. In 2011 I received my Bachelor of Science degree from UW-Stevens Point. My husband, Justin, also attended St. Mary's and graduated from Marathon High School. We have two children, Jordan and Kaylin, who are students here at St. Mary's. After being a stay-at-home mom for the past seven years, I'm excited to start working at St. Mary's!