Nancy Koehler joined the staff in 2014. She teaches Geometry, Algebra 2, and AP Calculus. She is also the summer school coordinator.

She is a 2012 graduate of Concordia University, Chicago with a bachelor’s degree in secondary education and mathematics. She earned her master’s degree in Mathematics Education from Aurora University in 2016. Nancy is a 2008 alum of Concordia Lutheran High School, and taught for two years at Faith Lutheran High School in Crystal Lake, Illinois.