Our Teachers


Mrs. Patty Koestler

Preschool Teacher/Director


Mrs. Koestler was born in Mankato, MN. She attended Monroe Elementary  School and Mankato West High School. After graduating from high school, she attended Martin Luther College and graduated with a Bachelor of Science Degree in Elementary Education. She has taught in MN and WI at the preschool through 4th grade levels and is currently a teacher and director at Trinity Lutheran Preschool- Caledonia.


Mrs. Koestler and her husband, Mike, have been blessed with four children. She enjoys spending time with family and friends, running, and working on home projects.


Inspired by her husband’s zeal for the ministry of Christian education, Mrs. Koestler loves to ponder the greatness of God’s power and love with these verses: “Now to Him who is able to do immeasurably more than all we ask or imagine, according to His power that is at work within us, to Him be glory in the church and in Christ Jesus throughout all generations….” Ephesians 3:20,21.


Mrs. Laurie Bunkelman

Preschool Aid


Mrs. Bunkelman was born in West Bend, WI.  She attended St. Lucas Lutheran School in Kewaskum, WI and Winnebago Lutheran Academy in Fond du Lac, WI.  She spent years in banking before marriage brought her to the Caledonia area.  She feels blessed and couldn’t be happier to be helping in Trinity’s preschool classroom.


Outside of the classroom, Mrs. Bunkelman enjoys staying active, coaching and playing volleyball, working with an autistic teenager, and helping out with various needs around Trinity.  But most of all, she cherishes time with her husband and three children.


A favorite hymn that pulls her heart strings is #566 We All Are One in Mission.  “We have different gifts, according to the grace given us.” –Romans 12:6  She knows and believes all of our various talents can be used for His good.





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