Mr. Krosschell teaches Pre-Calculus and Algebra. Mr. Krosschell graduated from Calvin College in December of 2002 with a degree in Secondary Education Mathematics & Physical Education. Mr. Krosschell was ecstatic to join the staff of GHS in January of 2003. Since joining GHS,  Mr. Krosschell has taught Algebra, Geometry, Honors Algebra 2, and Pre-Calculus.  Mr. Krosschell has been pleased to serve as co-advisor of the junior class executive board for 10 years, school improvement team president for 2 years, 8th grade boys soccer coach for 2 years, and boys varsity basketball assistant for 3 years. 
Mr. Krosschell also completed his Master's Degree in Educational Leadership at Grand Valley State University in 2011. He currently serves as the Mathematics Department chair, junior class advisor, and an assistant coach for Calvin College Men's Basketball.