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More About Our Preschool Teachers

Mrs. Joanna Gehrmann


3K Teacher /


I started working at STJB School 5 years ago in the Preschool Program. I live in Sun Prairie with my husband Jim and we are members of St. Dennis Parish in Madison. We have 3 grown children (Max, Mallory, Molly), a daughter-in-law (Meghan), a Goldendoodle (Mabel) and are so excited for the birth of our first grandchild. I love eating chocolate, cooking for my family, reading to children, the sun, boating with my family, wearing the color black, recess time and most of all God. I am grateful to be a part of the STJB School Family.

Mrs. Julie Nornberg


3K Assistant /


I'm married 23 years to Mark, and we have 4 children, ages 16, 14, 12, and 10. All of our children have attended St. John School, and this fall we have kids in 5th and 7th grades at SJS, plus 9th and 11th grades at St. Ambrose Academy. In recent years, I worked as a special needs assistant in Lodi and as a 4K and 1st grade assistant at SJS. This year I am so excited about the opportunity to help out in the mornings in preschool and 1st grade at SJS, as I love being around children. Our family enjoys hiking, camping, sailing, and kayaking.

Mrs. ​Katie Leskovar


4K Teacher /

My name is Katie Leskovar, this will be my 3rd year at St. John's and I am proud to call it my home away from home. I love spending time with my family. My favorite thing to do when time allows is to watch Discovery+ home improvement/refurbishing shows.

15 years of classroom experience in Texas, Nebraska, Maryland, and Wisconsin.
12 years in public school, 3 years in private school, 1 year at St. John's
4 years Educational specialist/Tutor for private clinics​

University of Nebraska-Lincoln
1991 BS in Elementary Education, K-6

Some graduate classes 
Cardinal Stritch University, 2014

Miss Elizabeth Vandenberg


4K Teacher /

My name is Elizabeth Vandenberg. I graduated from the University of Wisconsin-Whitewater in May 2021. I have always loved and had a passion for teaching and am excited to make a career out of my passion. This is my first year teaching at St. John’s, my second full year of teaching overall. I taught 4K during the 2021-2022 school year in Deforest. I attended St. Johns as a student from 1st grade through 6th grade and am excited to be back as a teacher. In my free time I enjoy going for walks and hikes, watching Hulu, and spending time with my family and friends.  



Associates Degree in Applied Science-Early Childhood Education, Madison College 

Bachelor’s Degree in Early Childhood Education (Birth-3rd Grade), University of Wisconsin-Whitewater

Mrs. Sue Clemens


4K Assistant /

My name is Sue Clemens. I am currently a 4k assistant. Even though I have only been working at St John's since 2011, I have been involved with the school for many years during the time my four children attended here. They are all married and it brings me joy to see two of my grandkids at the school. I feel blessed to be able to work with staff who love to share their faith.

Mrs. Michelle Colletti

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4K Assistant /

Coming Soon!

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