Dennis Rueter is a math instructor at Gibault Catholic High School.  Dennis was first hired in 1980 and over the years held many roles ranging from math teacher to Dean of Students.  After a enjoying a few years of retirement from the classroom, Dennis returned to our math department in the Fall of 2022 as a geometry teacher. Dennis is best known to the Gibault community as our longtime boys’ basketball coach.  Dennis holds a Bachelor’s Degree in Math from Easter Illinois University.