Faculty and Staff

Middle School Team

Sheryl McCarthy – Middle School Math and Science Guide

Sheryl McCarthy has a Bachelor’s degree in Biology and Chemistry from Hillsdale College in Michigan and a Master’s degree in Zoology from Miami University.  She taught 7th and 8th grade science and environmental education to all grades at Maumee Valley Country Day School in Toledo, Ohio for two years before beginning a twenty-year career as a behavioral pharmacologist at Pfizer, Inc. in Groton, Connecticut.  After leaving Pfizer, Sheryl decided to return to her first love of teaching and taught 6th, 7th and 8th grade math and science at Sacred Heart School in Groton for four years. Having grown up in Toledo, Sheryl is very happy to return to her home state of Ohio with her husband. Their two daughters, Katie and Ellie, are both currently in college.

Francess Lackney, Hummanities Guide/Catechist

Frances received her Bachelor’s degree in Theology from Franciscan University of Steubenville. In November of 2018, she began working at the Good Shepherd Catholic Montessori, teaching religion to adolescents. Over the course of the coming years, Frances has acquired more responsibility within the adolescent program. In fall of 2019, she transitioned into the Middle School Assistant Guide role, working to help manage day-to-day tasks and planning events. This opportunity allowed for a better understanding of the Montessori Method. Working closely with the MS guides, she learned the inner workings of the adolescent program, and the beauties behind guided Montessori learning. In 2020, she shifted into the Humanities Guide role, teaching history in conjunction with religion, eventually adding Writing and Reading in 2021. Frances hopes to continue her Montessori Adolescent Formation, and further her education by pursuing a Montessori Certification. Frances has developed a passion for teaching. She is passionate about Good Shepherd’s mission, and is proud to be an integral member of the GSCM community.


Mary Schwartz, Algebra and ELA Guide



Mary graduated with a degree in Elementary Education and Special Education from Xavier University.  She began her career teaching middle school students with special needs in the Northwest Local School District.  After her first child was born, she switched to part-time at the high school level, but felt the call to stay home full-time with her growing family.  She and her husband, Jeff, have four children, Josef, Sarah, Thomas, and Matthew. When her youngest child began kindergarten, she returned to the classroom by substitute teaching at her children’s schools.  Once she completed the coursework to renew her teaching licenses, she was blessed to have been hired as the middle school interventionist at GSCM in 2012 serving students on the Jon Peterson and Autism Scholarships. In addition to spending time with her family, including yearly vacations with her extended family, she enjoys reading, camping, and biking.


Ellie Sodergren, Assistant





Oliver Shepherd, Workshop Guide