Donnie Castans grew up in Schaumburg, Illinois, where he attended Schaumburg High School.  He has been in education since 2009 after he graduated form Illinois State University with an undergraduate degree in Chemistry Education.  Donnie first began teaching at Hoffman Estates High School for two years teaching Earth Science, Physical Science, and Chemistry while also coaching Freshman Boys Lacrosse.  He then moved to Lake Zurich High School and taught there for seven years.  While at Lake Zurich, Donnie taught General and Co-Taught Physical Science, Chemistry, Honors Chemistry, and Astronomy.  He also coached Scholastic Bowl and Boys Freshman Lacrosse.  In May of 2017, Donnie earned a Master's Degree in School Leadership from Concordia University.  The 2018-2019 school year is his first year at Round Lake High School as the Science Department Chair.