Mr. Byenburg is Jackson's summer school teacher. He is a bit of a sad sack. Jackson seen him crying in his Smart-Car.
After finding out Jackson failed a history test, D.J. visits Mr. Byenburg at the school. After doping his tuna-fish sandwich on the floor, picking up up and putting it in his pocket, Mr. Byenburg explains Jackson started his test on the second line instead of the first so he re-graded the paper by hand and Jackson received a 94.
Mr. Byenburg attends to Jackson when he slips on baloney, and to Chad when he falls while dancing.